matplotlib-users Mailing List for matplotlib (Page 3)

yadin Bocuma Rivas <con...@ya...> writes:

> i want to generate a contour plot [...] an example will be very
> helpfull

Please see examples/contour_demo.py in the matplotlib distribution and
http://matplotlib.sourceforge.net/matplotlib.pylab.html#-contour

-- 
Jouni K. Seppänen
http://www.iki.fi/jks

On 9/23/07, Tom Johnson <tj...@gm...> wrote:
>
>
> Also, it seems like there needs to be an extra keyword or option.  Suppose
> someone wanted a white facecolor in the (usetex=True) EPS file.  It doesn't
> seem like this is currently possible.  It would be nice if I could specify:
>
> savefig(file, facecolor=None, edgecolor=None)


It would also be nice if we could specify the axis background color to be
None as well (again, perhaps only useful when creating an EPS)...when using
the plot command.

=0Ahi !=0Alets say i have  an array of x,y 100 points and at each=0Apoint i=
 have a correspoinding magnitude(of electric field) i want to=0Agenerate a =
contour plot of these intensity and if posible show contourn lines =0Ahow c=
an i do these please any thing to start.....=0Aan example will be very help=
full=0A=0A=0A----- Mensaje original ----=0ADe: "matplotlib-users-request@li=
sts.sourceforge.net" <mat...@li...>=0APar=
a: mat...@li...=0AEnviado: domingo, 23 de septiem=
bre, 2007 22:06:00=0AAsunto: Matplotlib-users Digest, Vol 16, Issue 24=0A=
=0ASend Matplotlib-users mailing list submissions to=0A    matplotlib-users=
@lists.sourceforge.net=0A=0ATo subscribe or unsubscribe via the World Wide =
Web, visit=0A    https://lists.sourceforge.net/lists/listinfo/matplotlib-us=
ers=0Aor, via email, send a message with subject or body 'help' to=0A    ma=
tpl...@li...=0A=0AYou can reach the person =
managing the list at=0A    mat...@li...=0A=
=0AWhen replying, please edit your Subject line so it is more specific=0Ath=
an "Re: Contents of Matplotlib-users digest..."=0A=0A=0AToday's Topics:=0A=
=0A   1. Re: Screen location (John Hunter)=0A   2. Re: Screen location (Chr=
istopher Barker)=0A   3. Re: creating a timeline (John Hunter)=0A   4. Lege=
nd colours for multiple histograms (Ed Schofield)=0A   5. Re: Legend colour=
s for multiple histograms (Jouni K. Sepp?nen)=0A   6. three-d contour plot(=
intensity or arrow plot) (yadin Bocuma Rivas)=0A   7. Rv: three-d contour p=
lot(intensity or arrow plot)=0A      (yadin Bocuma Rivas)=0A   8. Re: Rv: t=
hree-d contour plot(intensity or arrow    plot)=0A      (Jouni K. Sepp?nen)=
=0A=0A=0A------------------------------------------------------------------=
----=0A=0AMessage: 1=0ADate: Fri, 21 Sep 2007 11:45:23 -0500=0AFrom: "John =
Hunter" <jd...@gm...>=0ASubject: Re: [Matplotlib-users] Screen locati=
on=0ATo: "Yo mismo Hotmail" <miq...@gm...>=0ACc: matplotlib-users@li=
sts.sourceforge.net=0AMessage-ID:=0A    <88e473830709210945m2656ae4apb17dec=
9f8...@ma...>=0AContent-Type: text/plain; charset=3DISO-8859-1=
=0A=0AOn 9/21/07, Yo mismo Hotmail <miq...@gm...> wrote:=0A> Dear Jo=
hn,=0A>=0A> First of all, thanks for your response. When I try this=0A>=0A>=
 fig =3D figure()=0A> fig.canvas.manager.window.move(100,400)=0A>=0A>  pyth=
on tells me that window has no attribute move. It's strange because I=0A> c=
an choose many differents attributes like=0A=0AWell, the example I posted w=
as for a *gtk* window, not a tk window.=0AYou will need to look at the API =
for the tk window to make the correct=0Acall.  We do not provide an abstrac=
t API across the GUI windows we=0Autilize internally.   We give you access =
to the widget, and if you=0Awant to make GUI specific calls on it, good luc=
k, but this is not=0Aencouraged or supported.=0A=0AJDH=0A=0AJDH=0A=0A=0A=0A=
------------------------------=0A=0AMessage: 2=0ADate: Fri, 21 Sep 2007 10:=
06:37 -0700=0AFrom: Christopher Barker <Chr...@no...>=0ASubject: R=
e: [Matplotlib-users] Screen location=0ATo: John Hunter <jd...@gm...>=
=0ACc: Yo mismo Hotmail <miq...@gm...>,=0A    matplotlib-users@lists=
.sourceforge.net=0AMessage-ID: <46F...@no...>=0AContent-Type: =
text/plain; charset=3DISO-8859-1; format=3Dflowed=0A=0AJohn Hunter wrote:=
=0A>> fig =3D figure()=0A>> fig.canvas.manager.window.move(100,400)=0A=0A> =
Well, the example I posted was for a *gtk* window, not a tk window.=0A=0AAn=
d, for what it's worth, wx spells it "Move()", with a capital "M".=0A=0A-Ch=
ris=0A=0A=0A-- =0AChristopher Barker, Ph.D.=0AOceanographer=0A=0AEmergency =
Response Division=0ANOAA/NOS/OR&R            (206) 526-6959   voice=0A7600 =
Sand Point Way NE   (206) 526-6329   fax=0ASeattle, WA  98115       (206) 5=
26-6317   main reception=0A=0AC...@no...=0A=0A=0A=0A------------=
------------------=0A=0AMessage: 3=0ADate: Fri, 21 Sep 2007 12:54:51 -0500=
=0AFrom: "John Hunter" <jd...@gm...>=0ASubject: Re: [Matplotlib-users=
] creating a timeline=0ATo: "Ryan Krauss" <rya...@gm...>=0ACc: matpl=
otlib-users <mat...@li...>=0AMessage-ID:=0A    <8=
8e4...@ma...>=0AContent-Type: =
text/plain; charset=3DISO-8859-1=0A=0AOn 9/20/07, Ryan Krauss <ryanlists@gm=
ail.com> wrote:=0A=0A> which also gets rid of my bottom x axis and leaves t=
ick marks along=0A> the top (see attached).  How do I get rid of the top ti=
ck marks, keep=0A> the bottom ones, and get the bottom x-axis back?=0A=0AI =
think this is what you are looking for:=0A=0Afrom pylab import figure, show=
=0A=0Afig =3D figure()=0Aax =3D fig.add_subplot(111)=0A=0Aax.axesFrame.set_=
data((0,0,1), (1,0,0))=0Aax.axesPatch.set_edgecolor('white')=0Aax.xaxis.set=
_ticks_position('bottom')=0Aax.yaxis.set_ticks_position('left')=0A=0Aax.plo=
t(range(10))=0A=0Ashow()=0A=0A=0A=0A------------------------------=0A=0AMes=
sage: 4=0ADate: Sat, 22 Sep 2007 16:53:57 +0100=0AFrom: "Ed Schofield" <eds=
cho...@gm...>=0ASubject: [Matplotlib-users] Legend colours for multip=
le histograms=0ATo: Mat...@li...=0AMessage-ID:=0A=
    <1b5...@ma...>=0AContent=
-Type: text/plain; charset=3DUTF-8=0A=0AHi all,=0A=0AI'm superimposing hist=
ograms of two data sets on the same axes, using=0Adifferent colours and alp=
ha transparency in the GtkAGG backend to show=0Athe overlapping regions. If=
 I plot a legend as below, the colours in=0Aboth legend entries are the sam=
e. Am I doing something wrong?=0A=0Aimport matplotlib=0Amatplotlib.use('GTK=
Agg')=0Aimport pylab=0Apylab.hist(data1, normed=3DTrue, alpha=3D0.8)=0Apyla=
b.hist(data2, normed=3DTrue, alpha=3D0.5, fc=3D'yellow')=0Apylab.legend(["d=
ata 1", "data 2"])=0Apylab.show()=0A=0AIf I try this instead:=0A=0Apylab.hi=
st(data1, normed=3DTrue, alpha=3D0.8, label=3D"data 1")=0Apylab.hist(data2,=
 normed=3DTrue, alpha=3D0.5, fc=3D"yellow", label=3D"data 2")=0Apylab.legen=
d()=0Apylab.show()=0A=0Athe legend entries are now coloured correctly, but =
there is one label=0Aentry for each bin, which is not particularly useful.=
=0A=0AI'm using the latest SVN version of matplotlib (r3874).=0A=0AI'd appr=
eciate any comments and/or quick workarounds!=0A=0A-- Ed=0A=0A=0A=0A-------=
-----------------------=0A=0AMessage: 5=0ADate: Sat, 22 Sep 2007 22:22:05 +=
0300=0AFrom: Jouni K. Sepp?nen <jk...@ik...>=0ASubject: Re: [Matplotlib-user=
s] Legend colours for multiple histograms=0ATo: mat...@li...ur=
ceforge.net=0AMessage-ID: <m2l...@ik...>=0AContent-Type: text/plai=
n; charset=3Diso-8859-1=0A=0A"Ed Schofield" <eds...@gm...> writes:=
=0A=0A> If I plot a legend as below, the colours in both legend entries are=
=0A> the same. Am I doing something wrong?=0A=0A> pylab.hist(data1, normed=
=3DTrue, alpha=3D0.8)=0A> pylab.hist(data2, normed=3DTrue, alpha=3D0.5, fc=
=3D'yellow')=0A> pylab.legend(["data 1", "data 2"])=0A=0AHere's a workaroun=
d that probably explains why this is happening:=0A=0A_, _, h1 =3D pylab.his=
t(data1, normed=3DTrue, alpha=3D0.8)=0A_, _, h2 =3D pylab.hist(data2, norme=
d=3DTrue, alpha=3D0.5, fc=3D'yellow')=0Apylab.legend([h1[0], h2[0]], ["data=
 1", "data 2"])=0A=0ABy default, the legend function assigns a legend entry=
 to every patch in=0Athe figure. Perhaps this could be seen as a bug in (hi=
st or) legend, but=0AI don't know how to fix it without introducing difficu=
lties in other=0Acases.=0A=0A-- =0AJouni K. Sepp?nen=0Ahttp://www.iki.fi/jk=
s=0A=0A=0A=0A=0A------------------------------=0A=0AMessage: 6=0ADate: Sun,=
 23 Sep 2007 12:06:50 -0700 (PDT)=0AFrom: yadin Bocuma Rivas <conra2004@yah=
oo.com>=0ASubject: [Matplotlib-users] three-d contour plot(intensity or arr=
ow=0A    plot)=0ATo: mat...@li..., vtkusers@vtk.o=
rg=0AMessage-ID: <944...@we...>=0AContent-Ty=
pe: text/plain; charset=3D"iso-8859-1"=0A=0Ahi !=0AI have an array of x,y,z=
 100 points(in tree-d) and at each point i have a correspoinding magnitude(=
of electric field) i want to generate a contour plot of these (intensity an=
d if posible arrowsat every point)=0Ahow can i do these please any thing to=
 start.....=0Aan example will be very helpfull=0A=0A=0A=0A=0A      ________=
___________________________________________________________________________=
_=0A?S? un mejor ambientalista!=0AEncuentra consejos para cuidar el lugar d=
onde vivimos.                       =0Ahttp://telemundo.yahoo.com/promos/me=
jorambientalista.html=0A-------------- next part --------------=0AAn HTML a=
ttachment was scrubbed...=0A=0A------------------------------=0A=0AMessage:=
 7=0ADate: Sun, 23 Sep 2007 12:20:16 -0700 (PDT)=0AFrom: yadin Bocuma Rivas=
 <con...@ya...>=0ASubject: [Matplotlib-users] Rv: three-d contour pl=
ot(intensity or=0A    arrow plot)=0ATo: mat...@li...urceforge.=
net=0AMessage-ID: <553...@we...>=0AContent-T=
ype: text/plain; charset=3D"iso-8859-1"=0A=0Aevery time i try to plot i hav=
e these error =0Ahow can i avoid it?=0ATraceback (most recent call last):=
=0A  File "C:/Python24/contour.py", line 9, in -toplevel-=0A    import matp=
lotlib.axes3d as p3=0A  File "C:\PYTHON24\lib\site-packages\matplotlib\axes=
3d.py", line 26, in -toplevel-=0A    import art3d=0A  File "C:\PYTHON24\lib=
\site-packages\matplotlib\art3d.py", line 17, in -toplevel-=0A    import pr=
oj3d=0A  File "C:\PYTHON24\lib\site-packages\matplotlib\proj3d.py", line 21=
, in -toplevel-=0A    cross =3D nx.cross=0AAttributeError: 'module' object =
has no attribute 'cross'=0A=0A=0A----- Mensaje reenviado ----=0ADe: yadin B=
ocuma Rivas <con...@ya...>=0APara: mat...@li...urceforg=
e.net; vtk...@vt...=0AEnviado: domingo, 23 de septiembre, 2007 21:06:50=
=0AAsunto: three-d contour plot(intensity or arrow plot)=0A=0Ahi !=0AI have=
 an array of x,y,z 100 points(in tree-d) and at each point i have a corresp=
oinding magnitude(of electric field) i want to generate a contour plot of t=
hese (intensity and if posible arrowsat every point)=0Ahow can i do these p=
lease any thing to start.....=0Aan example will be very helpfull=0A=0A=0A=
=0A=0A      =0A?S? un mejor asador!=0AAprende todo sobre asados en:=0A=0Aht=
tp://telemundo.yahoo.com/promos/mejorasador.html=0A=0A=0A=0A=0A=0A      ___=
___________________________________________________________________________=
______=0A?S? un mejor fot?grafo!=0APerfecciona tu t?cnica y encuentra las m=
ejores fotos.                       =0Ahttp://telemundo.yahoo.com/promos/me=
jorfotografo.html=0A-------------- next part --------------=0AAn HTML attac=
hment was scrubbed...=0A=0A------------------------------=0A=0AMessage: 8=
=0ADate: Sun, 23 Sep 2007 22:57:27 +0300=0AFrom: Jouni K. Sepp?nen <jks@iki=
.fi>=0ASubject: Re: [Matplotlib-users] Rv: three-d contour plot(intensity o=
r=0A    arrow    plot)=0ATo: mat...@li...=0AMessa=
ge-ID: <m26...@ik...>=0AContent-Type: text/plain; charset=3Diso-88=
59-1=0A=0Ayadin Bocuma Rivas <con...@ya...>=0Awrites:=0A=0A> every t=
ime i try to plot i have these error =0A=0AUnfortunately, the 3D plotting c=
apabilities of matplotlib are not being=0Amaintained. A list of Python soft=
ware for 3D plotting can be found at=0A=0Ahttp://new.scipy.org/Topical_Soft=
ware#head-8f49c45f696b5833d161aab95c22e5d495658a44=0A=0A-- =0AJouni K. Sepp=
?nen=0Ahttp://www.iki.fi/jks=0A=0A=0A=0A=0A------------------------------=
=0A=0A---------------------------------------------------------------------=
----=0AThis SF.net email is sponsored by: Microsoft=0ADefy all challenges. =
Microsoft(R) Visual Studio 2005.=0Ahttp://clk.atdmt.com/MRT/go/vse012000007=
0mrt/direct/01/=0A=0A------------------------------=0A=0A__________________=
_____________________________=0AMatplotlib-users mailing list=0AMatplotlib-=
us...@li...=0Ahttps://lists.sourceforge.net/lists/listinfo/=
matplotlib-users=0A=0A=0AEnd of Matplotlib-users Digest, Vol 16, Issue 24=
=0A************************************************=0A=0A=0A=0A=0A=0A=0A=0A=
      _____________________________________________________________________=
_______________=0A=A1S=E9 un mejor fot=F3grafo!=0APerfecciona tu t=E9cnica =
y encuentra las mejores fotos.                       =0Ahttp://telemundo.ya=
hoo.com/promos/mejorfotografo.html

Hello,

When using usetex=True and

     savefig(file, facecolor='w', edgecolor='w')

The behavior of the generated EPS file is more like:
   facecolor=None
   edgecolor='w'

That is, the image's facecolor is tranparent...taking on the background
color of the latex document---while the edgecolor is definitely white.

This seems inconsistent to me, and I was wondering if there was a quick
solution.  I actually like that the facecolor is transparent (or
nonexistent)...and I would like the same to hold for the edgecolor.  As of
now, I have an ugly white border around my image.

Also, it seems like there needs to be an extra keyword or option.  Suppose
someone wanted a white facecolor in the (usetex=True) EPS file.  It doesn't
seem like this is currently possible.  It would be nice if I could specify:

savefig(file, facecolor=None, edgecolor=None)

Thoughts?




\documentclass{article}
\usepackage{pstricks}
\usepackage{graphicx}
\begin{document}
\psframe*[linecolor=blue](-10in,-10in)(10in,10in)
\includegraphics{test}



from matplotlib import rc, rcParams
rc('text', usetex=True)
rc('ps', usedistiller='xpdf')
from pylab import *
subplot(111,axisbg='red')
plot(range(10))
savefig('test.eps', facecolor='white', edgecolor='white')

yadin Bocuma Rivas <con...@ya...>
writes:

> every time i try to plot i have these error 

Unfortunately, the 3D plotting capabilities of matplotlib are not being
maintained. A list of Python software for 3D plotting can be found at

http://new.scipy.org/Topical_Software#head-8f49c45f696b5833d161aab95c22e5d495658a44

-- 
Jouni K. Seppänen
http://www.iki.fi/jks

every time i try to plot i have these error =0Ahow can i avoid it?=0ATraceb=
ack (most recent call last):=0A  File "C:/Python24/contour.py", line 9, in =
-toplevel-=0A    import matplotlib.axes3d as p3=0A  File "C:\PYTHON24\lib\s=
ite-packages\matplotlib\axes3d.py", line 26, in -toplevel-=0A    import art=
3d=0A  File "C:\PYTHON24\lib\site-packages\matplotlib\art3d.py", line 17, i=
n -toplevel-=0A    import proj3d=0A  File "C:\PYTHON24\lib\site-packages\ma=
tplotlib\proj3d.py", line 21, in -toplevel-=0A    cross =3D nx.cross=0AAttr=
ibuteError: 'module' object has no attribute 'cross'=0A=0A=0A----- Mensaje =
reenviado ----=0ADe: yadin Bocuma Rivas <con...@ya...>=0APara: matpl=
otl...@li...; vtk...@vt...=0AEnviado: domingo, 23 =
de septiembre, 2007 21:06:50=0AAsunto: three-d contour plot(intensity or ar=
row plot)=0A=0Ahi !=0AI have an array of x,y,z 100 points(in tree-d) and at=
 each point i have a correspoinding magnitude(of electric field) i want to =
generate a contour plot of these (intensity and if posible arrowsat every p=
oint)=0Ahow can i do these please any thing to start.....=0Aan example will=
 be very helpfull=0A=0A=0A=0A=0A      =0A=A1S=E9 un mejor asador!=0AAprende=
 todo sobre asados en:=0A=0Ahttp://telemundo.yahoo.com/promos/mejorasador.h=
tml=0A=0A=0A=0A=0A=0A      ________________________________________________=
____________________________________=0A=A1S=E9 un mejor fot=F3grafo!=0APerf=
ecciona tu t=E9cnica y encuentra las mejores fotos.                       =
=0Ahttp://telemundo.yahoo.com/promos/mejorfotografo.html

hi !=0AI have an array of x,y,z 100 points(in tree-d) and at each point i h=
ave a correspoinding magnitude(of electric field) i want to generate a cont=
our plot of these (intensity and if posible arrowsat every point)=0Ahow can=
 i do these please any thing to start.....=0Aan example will be very helpfu=
ll=0A=0A=0A=0A=0A      ____________________________________________________=
________________________________=0A=A1S=E9 un mejor ambientalista!=0AEncuen=
tra consejos para cuidar el lugar donde vivimos.                       =0Ah=
ttp://telemundo.yahoo.com/promos/mejorambientalista.html

"Ed Schofield" <eds...@gm...> writes:

> If I plot a legend as below, the colours in both legend entries are
> the same. Am I doing something wrong?

> pylab.hist(data1, normed=True, alpha=0.8)
> pylab.hist(data2, normed=True, alpha=0.5, fc='yellow')
> pylab.legend(["data 1", "data 2"])

Here's a workaround that probably explains why this is happening:

_, _, h1 = pylab.hist(data1, normed=True, alpha=0.8)
_, _, h2 = pylab.hist(data2, normed=True, alpha=0.5, fc='yellow')
pylab.legend([h1[0], h2[0]], ["data 1", "data 2"])

By default, the legend function assigns a legend entry to every patch in
the figure. Perhaps this could be seen as a bug in (hist or) legend, but
I don't know how to fix it without introducing difficulties in other
cases.

-- 
Jouni K. Seppänen
http://www.iki.fi/jks

Hi all,

I'm superimposing histograms of two data sets on the same axes, using
different colours and alpha transparency in the GtkAGG backend to show
the overlapping regions. If I plot a legend as below, the colours in
both legend entries are the same. Am I doing something wrong?

import matplotlib
matplotlib.use('GTKAgg')
import pylab
pylab.hist(data1, normed=True, alpha=0.8)
pylab.hist(data2, normed=True, alpha=0.5, fc='yellow')
pylab.legend(["data 1", "data 2"])
pylab.show()

If I try this instead:

pylab.hist(data1, normed=True, alpha=0.8, label="data 1")
pylab.hist(data2, normed=True, alpha=0.5, fc="yellow", label="data 2")
pylab.legend()
pylab.show()

the legend entries are now coloured correctly, but there is one label
entry for each bin, which is not particularly useful.

I'm using the latest SVN version of matplotlib (r3874).

I'd appreciate any comments and/or quick workarounds!

-- Ed

On 9/20/07, Ryan Krauss <rya...@gm...> wrote:

> which also gets rid of my bottom x axis and leaves tick marks along
> the top (see attached).  How do I get rid of the top tick marks, keep
> the bottom ones, and get the bottom x-axis back?

I think this is what you are looking for:

from pylab import figure, show

fig = figure()
ax = fig.add_subplot(111)

ax.axesFrame.set_data((0,0,1), (1,0,0))
ax.axesPatch.set_edgecolor('white')
ax.xaxis.set_ticks_position('bottom')
ax.yaxis.set_ticks_position('left')

ax.plot(range(10))

show()

John Hunter wrote:
>> fig = figure()
>> fig.canvas.manager.window.move(100,400)

> Well, the example I posted was for a *gtk* window, not a tk window.

And, for what it's worth, wx spells it "Move()", with a capital "M".

-Chris


-- 
Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
NOAA/NOS/OR&R            (206) 526-6959   voice
7600 Sand Point Way NE   (206) 526-6329   fax
Seattle, WA  98115       (206) 526-6317   main reception

Chr...@no...

On 9/21/07, Yo mismo Hotmail <miq...@gm...> wrote:
> Dear John,
>
> First of all, thanks for your response. When I try this
>
> fig = figure()
> fig.canvas.manager.window.move(100,400)
>
>  python tells me that window has no attribute move. It's strange because I
> can choose many differents attributes like

Well, the example I posted was for a *gtk* window, not a tk window.
You will need to look at the API for the tk window to make the correct
call.  We do not provide an abstract API across the GUI windows we
utilize internally.   We give you access to the widget, and if you
want to make GUI specific calls on it, good luck, but this is not
encouraged or supported.

JDH

JDH

Dear John,

First of all, thanks for your response. When I try this

fig = figure()
fig.canvas.manager.window.move(100,400)

python tells me that window has no attribute move. It's strange because I
can choose many differents attributes like

>>> fig.canvas.manager.window
<Tkinter.Tk instance at 0x019100F8>
>>> fig.canvas.manager.window.attributes
<bound method Tk.wm_attributes of <Tkinter.Tk instance at 0x019100F8>>
>>> fig.canvas.manager.window.frame
<bound method Tk.wm_frame of <Tkinter.Tk instance at 0x019100F8>>

Then I've got a window class from Tk, but not the attriburte move. I need to
install Tkinter apart? Pylab suports differents GUIs. When you install
matplotlib/pylab package wich backends are installed? All?

I know embedding it's a good option, but for the moment it's too much work
for me. I've got not enought time. My programe has got differents modules
that call pylab plots, and a simple GUI which call this modules. I hope I
can move canvas frames. In the future I'll embedding matplotlib with some
package like wxmpl, but in the future.

Thanks again,
Miquel

On 9/20/07, John Hunter <jd...@gm...> wrote:
>
> On 9/19/07, Yo mismo Hotmail <miq...@gm...> wrote:
> > Hi all!
> >
> > I'm actually working with Matplotlib/Pylab Interface for making 2D plot.
> I
> > need to specify screen location where the frame will appear and I don't
> know
> > how. Supose a simple example like:
> >
> > from pylab import *
> >
> > t = arange(0.0,10,0.01)
> > s = 20*sin(2*pi*t)
> > c = 20*cos(2*pi*t)
> >
> > figure(1)
> > plot(s)
> > figure(2)
> > plot(c)
> > show()
> >
> > If I do it in this way, one frame is hidded behind the other one. How
> can I
> > modify frames attributes in order to change their position on the
> screen?
>
> pylab doesn't explicitly support this -- I have encouraged backend
> maintainers to attach the window instance to the figure manager
> instance, but I am not sure of all backends support this (GTK* and Tk
> do...).  The window instance will be a GUI specific widget.  Eg in the
> GTK* backends, a gtk.Window
>
> fig = figure()
> fig.canvas.manager.window.move(100,400)
>
> and other methods at
>
>
> http://www.pygtk.org/pygtk2reference/class-gtkwindow.html#method-gtkwindow--set-position
>
> If you need a lot of control, you are advised to embed mpl into a GUI
> app, eg see examples/embedding*.py in the mpl examples dir
>
>
> http://matplotlib.sourceforge.net/examples/http://matplotlib.sourceforge.net/examples/
>
>
> JDH
>

Jordan Atlas wrote:
> Ok, so am I to understand that usetex=True is not supported for PDF/EPS 
> output?

In 0.90.1, it is not supported in PDF.

>  Can you explain what the "Tex-like mathtext format parsed by 
> matplotlib" is?

matplotlib also has a built-in math formatting engine that does not use 
TeX itself.  You can use it by leaving "usetex=False" (the default) and 
putting a '$' at the beginning and end of your TeX strings.

   Plotting.xlabel(r'$\alpha^2$')

Unfortunately, the built-in engine only supports a subset of what TeX 
can do.  That subset is much smaller in 0.90.1 than in the current SVN, 
where much progress has recently been made.

See here for information pertaining to version 0.90.1:

   http://matplotlib.sourceforge.net/matplotlib.mathtext.html

Cheers,
Mike

-- 
Michael Droettboom
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA

>Do you have ghostscript installed? If you set verbose.level to debug or
>debug-annoying, what do you get?
>
>  
>

I realized that the ghostscript path wasn't set up properly, so that was 
what was causing part of the problem with EPS files.  It works sometimes 
now (sometimes the EPS is just a blank file, even though the plot shows 
up properly when I do pylab.show().  I'm still trying to narrow down 
what ameks the difference here).

>>I guess I mean TeX-like mathtext format parsed by matplotlib.  For 
>>example, I'm using things like this:
>>
>>rc('text', usetex=True) 
>>Plotting.xlabel(r'\textbf{Time (s)}', fontsize=16)
>>    
>>
>
>usetex=True means that you are trying to use an external TeX program.
>
>  
>

Ok, so am I to understand that usetex=True is not supported for PDF/EPS 
output?  Can you explain what the "Tex-like mathtext format parsed by 
matplotlib" is?

Thank you for your assistance,

--Jordan

Hello list,

with the latest version of svn the pylab.hist command doesn't work if I use 
align='center'. The error is due to a problem in the ax.bar - function as you 
can see in the example below. 
Probably width should be an array and not a list if one want to build 
width/2.. 
I'm not sure what is the right solution, but I have two proposals:
- change line 3187 to left = left - npy.asarray(width)/2.0
- uncomment lines 3123-3126 in axes.py, but I don't know what will be 
destroyed by that

thanks in advance for any help, best regards
Matthias

example - code :

In [1]: from numpy import ones, arange
In [2]: from pylab import axes
In [3]: ax = axes()
In [4]: ax.bar(arange(10), ones(10), width=0.8, bottom=None, align='center')
---------------------------------------------------------------------------
exceptions.TypeError                                 Traceback (most recent 
call last)

/home/michler/<ipython console>

/scratch/michler/SOFT/lib/python2.4/site-packages/matplotlib/axes.py in 
bar(self, left, height, width, bottom, color, edgecolor, linewidth, yerr, 
xerr, ecolor, capsize, align, orientation, log, **kwargs)
   3185         elif align == 'center':
   3186             if orientation == 'vertical':
-> 3187                 left = left - width/2.
   3188             elif orientation == 'horizontal':
   3189                 bottom = bottom-height/2.

TypeError: unsupported operand type(s) for /: 'list' and 'float'
> /scratch/michler/SOFT/lib/python2.4/site-packages/matplotlib/axes.py(3187)bar()
   3186             if orientation == 'vertical':
-> 3187                 left = left - width/2.
   3188             elif orientation == 'horizontal':

ipdb> type(width)
<type 'list'>
ipdb> width/2.
*** TypeError: unsupported operand type(s) for /: 'list' and 'float'

Fri, 21 Sep 2007 09:53:52 +0200, "Mark Bakker" <ma...@gm...>:

> I think LABELPAD is the padding between the label and the tick.

I did not think about it. Probably you are correct. Yet it still helps
if you have big/multiline axis label.

> What I would like to control is the distance between the label and the
> y-axis itself.
> This is desired when you do multiple subplots and you want all ylabels to
> align nicely; they may differ
> depending on the numbers along the yticks.

Well, I see the problem.

One solution is to use custom Formatter for yticks/xticks (e.g.
FixedFormatter or FormatStrFormatter) to ensure that tick labels have
the same width/height (printed with the same precision or padded with
spaces). User's Guide explains how to use formatters.

Thu, 20 Sep 2007 16:47:14 -0400, Alan G Isaac <ai...@am...>:

> On Thu, 20 Sep 2007, jetxee apparently wrote:
> > gca().yaxis.LABELPAD=20 # or the value you like 
> 
> This appears to be undocumented?  E.g.,
> http://matplotlib.sourceforge.net/matplotlib.axis.html

I thought it was undocumented, but it appears it is.
It is in `Data and other attributes' of Axis section.

--
jx

I think LABELPAD is the padding between the label and the tick.
What I would like to control is the distance between the label and the
y-axis itself.
This is desired when you do multiple subplots and you want all ylabels to
align nicely; they may differ
depending on the numbers along the yticks.

Any ways to control this?

Thanks, Mark


From: jetxee <je...@gm...>

This should help:
> gca().yaxis.LABELPAD=20 # or the value you like
>

Jordan Atlas <jc...@co...> writes:

> Now, when I try to save a PDF (with the newer version of matplotlib), I 
> get the error:
 [...]
>   File "C:\Python24\Lib\site-packages\matplotlib\backend_bases.py", line 
> 383, in draw_tex
>     raise NotImplementedError
> NotImplementedError

That means you are trying to call TeX, which is not supported by that
version of the pdf backend.

> I get the same error as in my original post when trying to save an EPS:
 [...]
> RuntimeError: ghostscript was not able to process your image.
> Here is the full report generated by ghostscript:

Do you have ghostscript installed? If you set verbose.level to debug or
debug-annoying, what do you get?

>>Do you mean the (TeX-like) mathtext format parsed by
>>matplotlib? 
>>
> I guess I mean TeX-like mathtext format parsed by matplotlib.  For 
> example, I'm using things like this:
>
> rc('text', usetex=True) 
> Plotting.xlabel(r'\textbf{Time (s)}', fontsize=16)

usetex=True means that you are trying to use an external TeX program.

-- 
Jouni K. Seppänen
http://www.iki.fi/jks

I think I have something I like reasonably well.  Is that attached
timeline fairly intuitive?  I am proposing a project for next summer
that has two main parts.  Each part has three subsections that are
roughly one month long.

Thanks,

Ryan

On 9/20/07, Ryan Krauss <rya...@gm...> wrote:
> I am really just getting to mess with this now and ran into an issue.
> I want to turn off the y axis and 3 sides of the border around the
> plot area, so that I left with just the bottom x-axis and its tick
> marks.  Turning off the y axis is easy enough, but the only way I
> found to get rid of the border is with
>
> ax.set_frame_on(False)
>
> which also gets rid of my bottom x axis and leaves tick marks along
> the top (see attached).  How do I get rid of the top tick marks, keep
> the bottom ones, and get the bottom x-axis back?
>
> Thanks,
>
> Ryan
>
> On 9/20/07, Ryan Krauss <rya...@gm...> wrote:
> > bling-bling.  I know it is eye candy and in questionable taste, but I
> > think it fits my non-technical audience in this case.  I think this is
> > enough to get me going.  Thanks John.
> >
> > Ryan
> >
> > On 9/20/07, John Hunter <jd...@gm...> wrote:
> > > On 9/20/07, Ryan Krauss <rya...@gm...> wrote:
> > > > I would need to create a timeline for a Latex document (eps output).
> > > > There may be other tools besides Matplotlib and I am open to
> > > > suggestions.  But I were going to use mpl, what would it take to do
> > > > something along these lines:
> > > > http://www.timelinemaker.com/product-samplecharts-constructiontimeline.html
> > > >
> > > > Basically, I would need a nicely formatted dates along the x-axis and
> > > > then lightly colored rectangles with text in them.  The width would
> > > > show when I anticipate some part of the project starting and ending.
> > > > The y coordinate of the rectangle would used to allow project portions
> > > > to overlap.  It would be nice but not essential if the rectangles had
> > > > a little fade in and out in their back ground color instead of a solid
> > > > color, but that is not essential.
> > > >
> > > > Is there a clean way to do this with mpl?
> > >
> > > See examples/broken_barh.py (this also allows breaks in the horizontal
> > > bars, eg if an event is interrupted and then resumes).  I haven't
> > > added gradient fills on bars because I don't think they convey little
> > > if any information but just add to the glitz factor (an example of
> > > "chart junk" to use Tufte's phrase) but at some point we should bow to
> > > popular pressure and add it.  Actually, you can hack gradient filled
> > > bars and axes backgrounds -- be careful, viewing the figure below may
> > > induce seizures.
> > >
> > > from pylab import figure, show, nx, cm
> > >
> > > def gbar(ax, x, y, width=0.5, bottom=0):
> > >    X = [[.6, .6],[.7,.7]]
> > >    for left,top in zip(x, y):
> > >        right = left+width
> > >        ax.imshow(X, interpolation='bicubic', cmap=cm.Blues,
> > >                  extent=(left, right, bottom, top), alpha=1)
> > >
> > > fig = figure()
> > >
> > > xmin, xmax = xlim = 0,10
> > > ymin, ymax = ylim = 0,1
> > > ax = fig.add_subplot(111, xlim=xlim, ylim=ylim,
> > >                     autoscale_on=False)
> > > X = [[.6, .6],[.7,.7]]
> > >
> > > ax.imshow(X, interpolation='bicubic', cmap=cm.copper,
> > >          extent=(xmin, xmax, ymin, ymax), alpha=1)
> > >
> > > N = 10
> > > x = nx.arange(N)+0.25
> > > y = nx.mlab.rand(N)
> > > gbar(ax, x, y, width=0.7)
> > > ax.set_aspect('normal')
> > > show()
> > >
> > > -------------------------------------------------------------------------
> > > This SF.net email is sponsored by: Microsoft
> > > Defy all challenges. Microsoft(R) Visual Studio 2005.
> > > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> > > _______________________________________________
> > > Matplotlib-users mailing list
> > > Mat...@li...
> > > https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> > >
> >
>
>

I am really just getting to mess with this now and ran into an issue.
I want to turn off the y axis and 3 sides of the border around the
plot area, so that I left with just the bottom x-axis and its tick
marks.  Turning off the y axis is easy enough, but the only way I
found to get rid of the border is with

ax.set_frame_on(False)

which also gets rid of my bottom x axis and leaves tick marks along
the top (see attached).  How do I get rid of the top tick marks, keep
the bottom ones, and get the bottom x-axis back?

Thanks,

Ryan

On 9/20/07, Ryan Krauss <rya...@gm...> wrote:
> bling-bling.  I know it is eye candy and in questionable taste, but I
> think it fits my non-technical audience in this case.  I think this is
> enough to get me going.  Thanks John.
>
> Ryan
>
> On 9/20/07, John Hunter <jd...@gm...> wrote:
> > On 9/20/07, Ryan Krauss <rya...@gm...> wrote:
> > > I would need to create a timeline for a Latex document (eps output).
> > > There may be other tools besides Matplotlib and I am open to
> > > suggestions.  But I were going to use mpl, what would it take to do
> > > something along these lines:
> > > http://www.timelinemaker.com/product-samplecharts-constructiontimeline.html
> > >
> > > Basically, I would need a nicely formatted dates along the x-axis and
> > > then lightly colored rectangles with text in them.  The width would
> > > show when I anticipate some part of the project starting and ending.
> > > The y coordinate of the rectangle would used to allow project portions
> > > to overlap.  It would be nice but not essential if the rectangles had
> > > a little fade in and out in their back ground color instead of a solid
> > > color, but that is not essential.
> > >
> > > Is there a clean way to do this with mpl?
> >
> > See examples/broken_barh.py (this also allows breaks in the horizontal
> > bars, eg if an event is interrupted and then resumes).  I haven't
> > added gradient fills on bars because I don't think they convey little
> > if any information but just add to the glitz factor (an example of
> > "chart junk" to use Tufte's phrase) but at some point we should bow to
> > popular pressure and add it.  Actually, you can hack gradient filled
> > bars and axes backgrounds -- be careful, viewing the figure below may
> > induce seizures.
> >
> > from pylab import figure, show, nx, cm
> >
> > def gbar(ax, x, y, width=0.5, bottom=0):
> >    X = [[.6, .6],[.7,.7]]
> >    for left,top in zip(x, y):
> >        right = left+width
> >        ax.imshow(X, interpolation='bicubic', cmap=cm.Blues,
> >                  extent=(left, right, bottom, top), alpha=1)
> >
> > fig = figure()
> >
> > xmin, xmax = xlim = 0,10
> > ymin, ymax = ylim = 0,1
> > ax = fig.add_subplot(111, xlim=xlim, ylim=ylim,
> >                     autoscale_on=False)
> > X = [[.6, .6],[.7,.7]]
> >
> > ax.imshow(X, interpolation='bicubic', cmap=cm.copper,
> >          extent=(xmin, xmax, ymin, ymax), alpha=1)
> >
> > N = 10
> > x = nx.arange(N)+0.25
> > y = nx.mlab.rand(N)
> > gbar(ax, x, y, width=0.7)
> > ax.set_aspect('normal')
> > show()
> >
> > -------------------------------------------------------------------------
> > This SF.net email is sponsored by: Microsoft
> > Defy all challenges. Microsoft(R) Visual Studio 2005.
> > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/
> > _______________________________________________
> > Matplotlib-users mailing list
> > Mat...@li...
> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> >
>

On Thu, 20 Sep 2007, jetxee apparently wrote:
> gca().yaxis.LABELPAD=20 # or the value you like 

This appears to be undocumented?  E.g.,
http://matplotlib.sourceforge.net/matplotlib.axis.html

Cheers,
Alan Isaac

Jouni K. Seppänen <jk...@ik...> writes:

> "Shishir Ramam" <sr...@gm...> writes:
>> What I cannot understand is why the vertical bars don't align to the
>> y-axis 0 point.
>
> Also if you don't draw some of the green lines, the red ones extend
> beyond the x-axis. I wonder if this is an artifact from the subpixel
> rendering in Agg and the snap-to-pixel corrections in axis lines...

No, it's much simpler: in matplotlibrc there is a setting for
"lines.solid_capstyle", and apparently the default is "projecting", but
you want "butt".

-- 
Jouni K. Seppänen
http://www.iki.fi/jks

Jouni,

>Which version of matplotlib are you using? The error message you quote
>for the pdf backend shows a line 1085 in get_canvas_width_height, which
>is impossible both in the latest released version 0.90.1 and in current
>svn. I vaguely remember there being a bug like that quite some time ago.
>
>  
>
I apologize for the missing information.  I was using matplotlib 0.90.0 
with python 2.4, and just upgraded to matplotlib 0.90.1 after reading 
your message.  Also, I'm doing this all on winXP.

Now, when I try to save a PDF (with the newer version of matplotlib), I 
get the error:

  File "C:\Python24\Lib\site-packages\matplotlib\pylab.py", line 796, in 
savefig
    return fig.savefig(*args, **kwargs)
  File "C:\Python24\Lib\site-packages\matplotlib\figure.py", line 759, 
in savefig
    self.canvas.print_figure(*args, **kwargs)
  File 
"C:\Python24\Lib\site-packages\matplotlib\backends\backend_tkagg.py", 
line 187, in print_figu
re
    agg.print_figure(filename, dpi, facecolor, edgecolor, orientation,
  File 
"C:\Python24\Lib\site-packages\matplotlib\backends\backend_agg.py", line 
497, in print_figure

    printfunc(filename, dpi, facecolor, edgecolor, orientation, **kwargs)
  File 
"C:\Python24\Lib\site-packages\matplotlib\backends\backend_pdf.py", line 
1393, in print_figur
e
    self.figure.draw(renderer)
  File "C:\Python24\Lib\site-packages\matplotlib\figure.py", line 601, 
in draw
    for a in self.axes: a.draw(renderer)
  File "C:\Python24\Lib\site-packages\matplotlib\axes.py", line 1286, in 
draw
    a.draw(renderer)
  File "C:\Python24\Lib\site-packages\matplotlib\axis.py", line 601, in draw
    tick.draw(renderer)
  File "C:\Python24\Lib\site-packages\matplotlib\axis.py", line 176, in draw
    if self.label1On: self.label1.draw(renderer)
  File "C:\Python24\Lib\site-packages\matplotlib\text.py", line 911, in draw
    Text.draw(self, renderer)
  File "C:\Python24\Lib\site-packages\matplotlib\text.py", line 420, in draw
    self._fontproperties, angle)
  File "C:\Python24\Lib\site-packages\matplotlib\backend_bases.py", line 
383, in draw_tex
    raise NotImplementedError
NotImplementedError

I get the same error as in my original post when trying to save an EPS:

  File "C:\Python24\Lib\site-packages\matplotlib\figure.py", line 759, 
in savefig
    self.canvas.print_figure(*args, **kwargs)
  File 
"C:\Python24\Lib\site-packages\matplotlib\backends\backend_tkagg.py", 
line 187, in print_figu
re
    agg.print_figure(filename, dpi, facecolor, edgecolor, orientation,
  File 
"C:\Python24\Lib\site-packages\matplotlib\backends\backend_agg.py", line 
497, in print_figure

    printfunc(filename, dpi, facecolor, edgecolor, orientation, **kwargs)
  File 
"C:\Python24\Lib\site-packages\matplotlib\backends\backend_ps.py", line 
1011, in print_figure

    orientation, papertype)
  File 
"C:\Python24\Lib\site-packages\matplotlib\backends\backend_ps.py", line 
1247, in _print_figur
e_tex
    else: gs_distill(tmpfile, ext=='.eps', ptype=papertype, bbox=bbox)
  File 
"C:\Python24\Lib\site-packages\matplotlib\backends\backend_ps.py", line 
1366, in gs_distill
    if exit_status: raise RuntimeError('ghostscript was not able to 
process \
RuntimeError: ghostscript was not able to process your image.
Here is the full report generated by ghostscript:


>In any case, no released version of matplotlib supports using TeX with
>the pdf backend. Do you mean the (TeX-like) mathtext format parsed by
>matplotlib? In current svn there is some support for TeX with the pdf
>backend, but it has not (AFAIK) been tested on Windows.
>  
>
I guess I mean TeX-like mathtext format parsed by matplotlib.  For 
example, I'm using things like this:

rc('text', usetex=True) 
Plotting.xlabel(r'\textbf{Time (s)}', fontsize=16)

>Gmane mangles the URL (to protect email addresses) so I can't read the
>message you cite, but using the XPDF distiller means setting
>ps.usedistiller to xpdf in your matplotlibrc file. You will need to have
>ps2pdf (from ghostscript) and pdftops (from xpdf or poppler) installed.
>
>  
>

I will look into this immediately.

Thank you,

--Jordan