matplotlib-users Mailing List for matplotlib (Page 4)

>>>>> "Jean-Michel" == Jean-Michel Philippe <jea...@ir...> writes:

    Jean-Michel> Ok. Now suppose you write an application that runs a
    Jean-Michel> set of algorithms not known in advance. These
    Jean-Michel> algorithms may or may not create figures depending on
    Jean-Michel> what they perform; they may also encounter
    Jean-Michel> difficulties (e.g. not enough input data) so that
    Jean-Michel> none of them is finally able to create a figure. As
    Jean-Michel> this is always better to dissociate code pieces the
    Jean-Michel> more as possible, I'd prefer not to use a global
    Jean-Michel> variable to trace figure creation. So is there a way
    Jean-Michel> to know that no figure was created?

In 0.63, we introduced a flag on the
matplotlib.backends.draw_if_interactive function.  If
draw_if_interactive._called is False, the function was never called
and thus no plotting commands were issued.  You may be able to use
this to decide whether to call show or not.  

Eg , at the end of your script

  if draw_if_interactive._called: show()

Note if you are using a pure image backend (eg agg, svg, ps) you do
not need show at all; this is for GUI backends only.  Just call
savefig anywhere in your code.

But if you really want full control with no magic globals, I suggest
using the matplotlib API rather than the matlab interface.  Here is a
minimal example with the SVG backend to create a figure w/o the matlab
interface

  
  from matplotlib.backends.backend_svg import FigureCanvasSVG
  from matplotlib.figure import Figure
  fig = Figure()
  ax = fig.add_subplot(111)
  ax.plot([1,2,3])
  canvas = FigureCanvasSVG(fig)
  canvas.print_figure('myfile.svg')

There are several examples called embedding_in_*.py at
http://matplotlib.sf.net/examples that show how to do this for your
GUI of choice.

Let me know if you need more help; and be sure to tell which backend
you are targetting.

JDH

>>>>> "Stephen" == Stephen Walton <ste...@cs...> writes:

    Stephen> On Tue, 2004-10-05 at 09:30, Wasinee Rungsarityotin
    Stephen> wrote:
    >> src/_na_image.cpp:780: `png_infopp_NULL' undeclared (first use
    >> this function)

    Stephen> On my system this is defined in /usr/include/png.h, part
    Stephen> of libpng version 1.2.5.  -- Stephen Walton
    Stephen> <ste...@cs...> Dept. of Physics & Astronomy,
    Stephen> Cal State Northridge

I second this - it looks like it may be a libpng version problem.  Off
the top of my head, I don't know what the minimum libpng version
requirement is, but if 1.2.5 is working for Stephen, I suggest
installing that or later.

JDH

>>>>> "Yann" == Yann Le Du <yan...@no...> writes:

    Yann> Hello again, I found the solution : in file transforms.py I
    Yann> changed the lines 181-183 by replacing :

    Yann> from _transforms import ...

It looks like your matplotlib directory is out of whack.  You should
remove the entire build tree and start over.  In matplotlib-0.63,
_transforms.so does not exist; it is replaced by
_lib/matplotlib/_transforms.py, which imports either the _na or _nc
version.

So even though you got it to work, that you had a problem at all
indicates your src directory is messed up, and so I advise you to get
a clean start.

JDH

Unless I send this when I notice it, I'll forget to send it.
But I'm not so cold hearted as to hope for any response from
John during the early weeks of fatherhood!

If a plot makes use of both axhline() and axis(), then
axis() must come last or the results are not as expected.
Actually I have found it often desirable for axis to come
last, but I will simply raise the question of whether this
need---possibly surprising to a new user---might be
transcended.

fwiw,
Alan Isaac

PS Best wishes to John in his newest and most creative endeavor.

Hello again,

I found the solution : in file transforms.py I changed the lines 181-183 
by replacing :

from _transforms import ...

with :

from _nc_transforms import ...

The file _transforms.so is apparently not built, only the _nc_ and _na_ 
versions are built.

Note that is also works with :

from _na_transforms import ...

Yann Le Du

John Hunter wrote:

> from tempfile import mktemp
> from urllib import urlretrieve
> from matplotlib.matlab import *
> 
> url = 'http://matplotlib.sf.net/clara.png'
> fname =  mktemp('.png')
> print 'Downloading image; this may take a minute...'
> urlretrieve(url, fname)
> 
> figure(figsize=(8,6))
> im = imread(fname)
> imshow(im)
> axis('off')
> title('Clara Charlotte Hunter, born 10/2/2004')
> show()
> 

It didn't work OTOB with my rather old matplotlib and it gave me a good 
reason to upgrade. :-)

Congratulations and best wishes for the whole family!

ST
--

Leo Budd wrote:
> Today I tried to install matplotlib, first downloading 
> matplotlib-0.63.4.tar.gz, then "gunzip matplotlib-0.63.4.tar.gz", then "tar
> -vxf  matplotlib-0.63.4.tar", then I don't know what to do.
> 
> I tried "python setup.py build", but got the following error:
> 
> Traceback (most recent call last):
>   File "setup.py", line 39, in ?
>     VERBOSE = False  # insert lots of diagnostic prints in extension code
> NameError: name 'False' is not defined

False was introduced in a recent version of Python (2.2 maybe). You must 
be running an older python. just run:

python

and you'll see what version it is in the startup message.

If you have multiple versions installed, try:

python2.3 setup.py build

If not, get and install 2.3, and then try again. What system is this?

if you're not sure, try:

locate "*/bin/*python*"

If your locate db is up to date, you should get a few options.

What OS/distro/version are you running?

-Chris



-- 
Christopher Barker, Ph.D.
Oceanographer
                                     		
NOAA/OR&R/HAZMAT         (206) 526-6959   voice
7600 Sand Point Way NE   (206) 526-6329   fax
Seattle, WA  98115       (206) 526-6317   main reception

Chr...@no...

Leo, 

> Traceback (most recent call last):
>   File "setup.py", line 39, in ?
>     VERBOSE = False  # insert lots of diagnostic prints in extension code
> NameError: name 'False' is not defined

Matplotlib 0.63.4 requires python 2.3.  It sounds like you have 
an earlier version of python that doesn't recognize False (I 
think this was introduced for python2.2, but I'm not certain).

> This is a shared linux web server, I am not root, I want to
> install matplotlib under my login directory, and be able to draw
> stock charts with OHLC (Open High Low Close) as well as volume
> on a second x-axis.

You need python2.3.  You could either convince the admin to 
install this or install a private copy of python2.3 in your 
own directory.

--Matt

Hello,

I've installed the latest matplotlib (27 september) and when I try to do :

from matplotlib.matlab import *

I get this :

Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/lib/python2.3/site-packages/matplotlib/matlab.py", line 160, 
in ?
    from axes import Axes
  File "/usr/lib/python2.3/site-packages/matplotlib/axes.py", line 9, in ?
    from artist import Artist
  File "/usr/lib/python2.3/site-packages/matplotlib/artist.py", line 4, in 
?
    from transforms import identity_transform
  File "/usr/lib/python2.3/site-packages/matplotlib/transforms.py", line 
182, in ?
    from _transforms import IDENTITY, LOG10, Func, FuncXY, PolarXY
ImportError: cannot import name IDENTITY


YLD

I have an application that uses matplotlib running on windows xp.

The wxpython scripts run OK, and the scripts compile to an exe OK.

There are lots of "missing Modules" but the FAQ says to ignore these.

On running the exe I get the message :

"This application has requested the runtime to terminate it in an =
unusual way".

Can anyone help please ?

Regards
Gary

Today I tried to install matplotlib, first downloading 
matplotlib-0.63.4.tar.gz, then "gunzip matplotlib-0.63.4.tar.gz", then "tar
-vxf  matplotlib-0.63.4.tar", then I don't know what to do.

I tried "python setup.py build", but got the following error:

Traceback (most recent call last):
  File "setup.py", line 39, in ?
    VERBOSE = False  # insert lots of diagnostic prints in extension code
NameError: name 'False' is not defined

I also tried "setup.py", and "make -f Makefile" but without any success.

Which command I should use to install matploylib?

This is a shared linux web server, I am not root, I want to install matplotlib
under my login directory, and be able to draw stock charts with OHLC (Open High
Low Close) as well as volume on a second x-axis.

Leo


		
_______________________________
Do you Yahoo!?
Declare Yourself - Register online to vote today!
http://vote.yahoo.com

> congrats, John, but if my experience is any indication, we'll see a=20
> slowing in matplotlib progress. At least we know why!
>=20
> -Chris

I was thinking exactly the same thing. I think we can also now expect new=
 graphs in cvs examples of weight versus time, hours slept per night etc.
Congratulations from me too John,

regards,
Gary R.
--=20
___________________________________________________________
Sign-up for Ads Free at Mail.com
http://promo.mail.com/adsfreejump.htm

Congratulations to you and Ms. Hunter!

Jim

On Tue, 5 Oct 2004, John Hunter wrote:

> 
> from tempfile import mktemp
> from urllib import urlretrieve
> from matplotlib.matlab import *
> 
> url = 'http://matplotlib.sf.net/clara.png'
> fname =  mktemp('.png')
> print 'Downloading image; this may take a minute...'
> urlretrieve(url, fname)
> 
> figure(figsize=(8,6))
> im = imread(fname)
> imshow(im)
> axis('off')
> title('Clara Charlotte Hunter, born 10/2/2004')
> show()
> 
> 
> -------------------------------------------------------
> This SF.net email is sponsored by: IT Product Guide on ITManagersJournal
> Use IT products in your business? Tell us what you think of them. Give us
> Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more
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> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> 

-- 
Dr. James A. Benson
United States Naval Observatory
Navy Prototype Optical Interferometer
Flagstaff, AZ 86001
Email: jb...@no...
       jb...@se...
Voice: 928-773-4868/928-779-5132
Fax:   928-779-9568

John,
Congratulations!  She's beautiful.

Barry Drake

--- John Hunter wrote:

> 
> from tempfile import mktemp
> from urllib import urlretrieve
> from matplotlib.matlab import *
> 
> url = 'http://matplotlib.sf.net/clara.png'
> fname =  mktemp('.png')
> print 'Downloading image; this may take a minute...'
> urlretrieve(url, fname)
> 
> figure(figsize=(8,6))
> im = imread(fname)
> imshow(im)
> axis('off')
> title('Clara Charlotte Hunter, born 10/2/2004')
> show()
> 
> 
>
-------------------------------------------------------
> This SF.net email is sponsored by: IT Product Guide
> on ITManagersJournal
> Use IT products in your business? Tell us what you
> think of them. Give us
> Your Opinions, Get Free ThinkGeek Gift Certificates!
> Click to find out more
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http://productguide.itmanagersjournal.com/guidepromo.tmpl
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> 

matplotlib is truely amazing.  Is this patch for creating babies in CVS?

Congradulations.

John Hunter wrote:
> from tempfile import mktemp
> from urllib import urlretrieve
> from matplotlib.matlab import *
> 
> url = 'http://matplotlib.sf.net/clara.png'
> fname =  mktemp('.png')
> print 'Downloading image; this may take a minute...'
> urlretrieve(url, fname)
> 
> figure(figsize=(8,6))
> im = imread(fname)
> imshow(im)
> axis('off')
> title('Clara Charlotte Hunter, born 10/2/2004')
> show()
> 


-- 
Paul Barrett, PhD      Space Telescope Science Institute
Phone: 410-338-4475    ESS/Science Software Branch
FAX:   410-338-4767    Baltimore, MD 21218

congrats, John, but if my experience is any indication, we'll see a 
slowing in matplotlib progress. At least we know why!

-Chris


-- 
Christopher Barker, Ph.D.
Oceanographer
                                     		
NOAA/OR&R/HAZMAT         (206) 526-6959   voice
7600 Sand Point Way NE   (206) 526-6329   fax
Seattle, WA  98115       (206) 526-6317   main reception

Chr...@no...

On Tue, 2004-10-05 at 09:30, Wasinee Rungsarityotin wrote:

> src/_na_image.cpp:780: `png_infopp_NULL' undeclared (first use this funct=
ion)

On my system this is defined in /usr/include/png.h, part of libpng
version 1.2.5. =20
--=20
Stephen Walton <ste...@cs...>
Dept. of Physics & Astronomy, Cal State Northridge

       Hi,

I think to have found a bug in axis. You can't choose a multiplelocator 
with 0.5 or 0.3 for example, you can but the result is not what you're 
expecting. (see fig1 for the effect)

Another funny script (see scripts2 and scripts3)  with tick problem. 
Compare the two following scripts, the only difference is to tell to 
yaxis to use the same characteristic than xaxis. The very funny thing is 
to change the ymajorLocator in xmajorLocator and etc with you're doing 
the setting for the y axis... That influx in the x axis. See fig2 and fig3.

Perhaps (probably) I'm doing something bad but I'm not able to find where.

Thanks,

    Nicolas

Congratulations John!!

On Tuesday 05 October 2004 17:42, John Hunter wrote:
> from tempfile import mktemp
> from urllib import urlretrieve
> from matplotlib.matlab import *
>
> url = 'http://matplotlib.sf.net/clara.png'
> fname =  mktemp('.png')
> print 'Downloading image; this may take a minute...'
> urlretrieve(url, fname)
>
> figure(figsize=(8,6))
> im = imread(fname)
> imshow(im)
> axis('off')
> title('Clara Charlotte Hunter, born 10/2/2004')
> show()
>
>
> -------------------------------------------------------
> This SF.net email is sponsored by: IT Product Guide on ITManagersJournal
> Use IT products in your business? Tell us what you think of them. Give us
> Your Opinions, Get Free ThinkGeek Gift Certificates! Click to find out more
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> _______________________________________________
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> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Congratulations John, thats wonderful!




On Tuesday 05 October 2004 01:42 pm, John Hunter wrote:
> from tempfile import mktemp
> from urllib import urlretrieve
> from matplotlib.matlab import *
>
> url =3D 'http://matplotlib.sf.net/clara.png'
> fname =3D =A0mktemp('.png')
> print 'Downloading image; this may take a minute...'
> urlretrieve(url, fname)
>
> figure(figsize=3D(8,6))
> im =3D imread(fname)
> imshow(im)
> axis('off')
> title('Clara Charlotte Hunter, born 10/2/2004')
> show()

=2D-=20

Darren

CONGRATULATIONS....

John Hunter wrote:

>from tempfile import mktemp
>from urllib import urlretrieve
>from matplotlib.matlab import *
>
>url = 'http://matplotlib.sf.net/clara.png'
>fname =  mktemp('.png')
>print 'Downloading image; this may take a minute...'
>urlretrieve(url, fname)
>
>figure(figsize=(8,6))
>im = imread(fname)
>imshow(im)
>axis('off')
>title('Clara Charlotte Hunter, born 10/2/2004')
>show()
>
>  
>


-- 
Peter Groszkowski         Gemini Observatory
Tel: +1 808 974-2509      670 N. A'ohoku Place
Fax: +1 808 935-9235      Hilo, Hawai'i 96720, USA

from tempfile import mktemp
from urllib import urlretrieve
from matplotlib.matlab import *

url = 'http://matplotlib.sf.net/clara.png'
fname =  mktemp('.png')
print 'Downloading image; this may take a minute...'
urlretrieve(url, fname)

figure(figsize=(8,6))
im = imread(fname)
imshow(im)
axis('off')
title('Clara Charlotte Hunter, born 10/2/2004')
show()

Hi,

I am having a problem getting the image extension to compile due to an obscure
problem I cannot understand because other extensions have been
compiled properly.

The error is that a variable is not declared which is strange:

src/_na_image.cpp:780: `png_infopp_NULL' undeclared (first use this function)

We are using gcc 2.95.3 and this is matplotlib-0.63.4. See below for the output
of the whole setup session.

Our Linux setup environment is not standard,
so I am not sure if this is specific problem with our setup for png or
is is really a bug?
I would appreciate any help I can get.

Regard,
- WR

-------------------------------------------------------------------------------------------
rungsari@levy:/scratch/local/matplotlib-0.63.4> python2.3 setup.py build
Compiling matplotlib for: both
GTKAgg requires pygtk
running build
running build_py
running build_ext
building 'matplotlib._na_image' extension
gcc -fno-strict-aliasing -DNDEBUG -g -O3 -Wall -Wstrict-prototypes -g
-fPIC -Isrc -Iagg22/include -I. -I/usr/local/include -I/usr/include
-I/package/python/2.3.0/linux/include/python2.3 -c src/_na_image.cpp
-o build/temp.linux-i686-2.3/src/_na_image.o -DNUMARRAY=1
In file included from /package/python/2.3.0/linux/include/python2.3/Python.h:8,
                 from src/_na_image.cpp:6:
/package/python/2.3.0/linux/include/python2.3/pyconfig.h:844: warning:
`_POSIX_C_SOURCE' redefined
/usr/local/include/features.h:171: warning: this is the location of
the previous definition
src/_na_image.cpp: In method `class Py::Object
_image_module::readpng(const Py::Tuple &)':
src/_na_image.cpp:780: `png_infopp_NULL' undeclared (first use this function)
src/_na_image.cpp:780: (Each undeclared identifier is reported only once
src/_na_image.cpp:780: for each function it appears in.)

>
> from the numpy list:
>  > numarray allows one to customize how errors are handled. You can
>  > choose:
>  >
>  > 1) to silently ignore all errors.
>  > 2) print a warning message (default)
>  > 3) raise an exception.
>  >
>  > One may separately set one of these three behaviors for each of
>  > the 4 ieee categories of floating point errors, namely
>  >
>  > 1) invalid results (i.e., NaNs)
>  > 2) divide by zeros (Infs)
>  > 3) overflows
>  > 4) underflows
>
> now try this:
> from numarray import *
> 1./arange(10)
> Warning: Encountered divide by zero(s)  in divide
> array([              inf,   1.00000000e+000,   5.00000000e-001,
>          3.33333333e-001,   2.50000000e-001,   2.00000000e-001,
>          1.66666667e-001,   1.42857143e-001,   1.25000000e-001,
>          1.11111111e-001])
>
>
> there is the inf!!
>

Thank you Flavio,

I had tried the test you just suggested, and only got the warning message. I 
incorrectly assumed that the result had not been returned. Now I see that it 
was returned:

from numarray import *
a=1./arange(10) #displays error
print a              # displays a with the inf

Thanks again,

Darren

On Mon, 2004-10-04 at 10:43, Flávio Codeço Coelho wrote:
> On Monday 04 October 2004 09:27, Jon Peirce wrote:
> > On my AMD64 (using pre-compiled version as packaged by enthought) I get
> >
> > the expected results from RandomArray under Numeric ie:
> >  >>> from RandomArray import *
> >  >>> normal(2,2,10)
> >
> > array([-0.43560529,  2.67296922,  0.84804749,  4.26332831,  0.64425385,
> > 3.43939352,
> >              4.07021809,  3.6235764 ,  2.93580639,  1.81101392])
> >
> > Jon
> 
> Jon,
> 
> was you pre compiled Numeric compile for amd64 or for x86?
> 
> I think this is a result of the compilation .
> 
> Flavio

Pearu Peterson,  the guy who does f2py for SciPy, also commented
recently on num...@li... that he had found and fixed
this problem in Numeric for SciPy.  He posted a patch which I also
applied to Numeric on Source Forge;  that is still unreleased.  The
contents of the patch were already in numarray.random_array.

Todd


> > >Message: 3
> > >From: =?iso-8859-1?q?Fl=E1vio_Code=E7o_Coelho?= <fcc...@fi...>
> > >Organization: PROCC-Fiocruz
> > >To: mat...@li...
> > >Date: Fri, 1 Oct 2004 17:06:10 +0000
> > >Subject: [Matplotlib-users] warning: Numeric and amd64
> > >
> > >Hi,
> > >
> > >look at this:
> > >>>>>>> from RandomArray import *
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>> normal(2,2,10)
> > >
> > > array([ 2.,  2.,  2.,  2.,  2.,  2.,  2.,  2.,  2.,  2.])
> > >
> > >This is Numeric 23.1 compiled on my AMD64!!! I ran the same tests on a
> > > 32bit P4 and it ran fine.
> > >Has anyone else seen this before?
> > >
> > >For those that didn't understand, the normal function as called above,  is
> > >supposed to give me ten samples form a normal distribution with mean = 2
> > > and standard deviation = 2
> > >
> > >luckily:
> > >>>>>>> from numarray.random_array import *
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>>
> > >>>>>>> normal(2,2,10)
> > >
> > >array([-0.04525638,  4.31467819, -0.17468357,  5.29377031,  0.84202135,
> > >        5.29593539,  4.69651532,  1.61354655,  1.10839236,  1.7743317 ])
> > >
> > >If anybody still needed a reason for switching to numarray, there you go!
> > >
> > >I anybody here subscribes the numeric or numarray mailing lists (i.e. if
> > > they even exist) could you please forward this message to them?
> > >
> > >Flavio
> >
> > This message has been scanned but we cannot guarantee that it and any
> > attachments are free from viruses or other damaging content: you are
> > advised to perform your own checks.  Email communications with the
> > University of Nottingham may be monitored as permitted by UK legislation.
> >
> >
> >
> > -------------------------------------------------------
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> 
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