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From: Benjamin R. <ben...@ou...> - 2010-08-05 14:52:59
|
On Thu, Aug 5, 2010 at 2:48 AM, Jorge Scandaliaris
<jor...@ya...>wrote:
> Benjamin Root <ben.root@...> writes:
> >
> <snip>
> > Probably not directly, but I hadn't thought about that before. For a set
> of
> > scatter points that are colored by values, what should the legend show?
> In
> > other words, what does it *mean* for there to be a legend for points that
> are
> > colored in a potentially non-uniform manner?So, maybe this is desired
> behavior
> > (but possibly by accident)?
> > Thanks for your help,
> > Ben Root
>
> I thought for a moment that legend was using the color of the first point
> in the
> set, but a quick test reveals that no matter what colormap you specify, the
> marker color inside the legend is blue. BTW, I think I've found another
> thing
> related to legend() and scatter plots: the 'numpoints' keyword argument to
> legend is not respected, as showed in the example pasted below,
>
> Jorge
>
> -------
> import numpy as np
> import matplotlib as mpl
> import matplotlib.pyplot as plt
>
> data0 = np.random.rand(10,2)
> data1 = np.random.rand(10,2)
> data2 = np.random.rand(10,2)
> data = [data0, data1, data2]
>
> fig, ax = plt.subplots(1,1)
> norm = mpl.colors.Normalize(0,len(data))
> cmap = mpl.cm.afmhot
>
> sc = []
> labels = []
> for i,d in enumerate(data):
> sc.append(ax.scatter(d.T[0], d.T[1], c=np.ones(d.shape[0])*i,
> norm=norm, cmap=cmap))
> labels.append('data set ' + str(i))
> ax.legend(sc, labels, numpoints=1)
> plt.show()
> -------
>
>
Yes, this was found a little while back and I believe it was fixed for v1.0.
Ben Root
|
|
From: Michael D. <md...@st...> - 2010-08-05 13:25:10
|
It looks like you're configured for the STIX fonts (the rcParam mathtext.fontset = stix), but they are not installed on your system. Do you have the file "STIXGeneral.ttf" on your system? Perhaps you need to install an additional package. Mike On 08/04/2010 03:18 PM, Michael Hannon wrote: >> Which backend are you using? >> >> Can you set the rcParam "verbose.level" to "debug-annoying" and then >> send us the output produced when running a plot? This will include a >> number of lines about font lookup that may help us diagnose the problem. >> > > Hi, Mike. I'm currently doing this interactively on a Gnome, X-windows desktop. > > The default backend for this is evidently: > > TkAgg > > I've appended the debug-annoying output, but it may be, as Ben Root has > observed, > that I just need a newer version of matplotlib. > > Thanks for your help. > > -- Mike > > > > > > backend TkAgg version 8.5 > >>>> figure() >>>> > <matplotlib.figure.Figure object at 0x18e6bd0> > >>>> text(0.5, 0.5, r'$\pi$') >>>> > <matplotlib.text.Text object at 0x1a1dbd0> > >>>> show() >>>> > FigureCanvasAgg.draw > RendererAgg.__init__ > RendererAgg.__init__ width=650.0, height=490.0 > RendererAgg.__init__ _RendererAgg done > RendererAgg.__init__ done > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > findfont: Matching > :family=sans-serif:style=normal:variant=normal:weight=normal:stretch=normal:size=medium > to DejaVu Sans (/usr/share/fonts/dejavu/DejaVuSans.ttf) with score of 0.100000 > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg.points_to_pixels > RendererAgg._get_agg_font > RendererAgg._get_agg_font > RendererAgg.draw_text > RendererAgg._get_agg_font > RendererAgg._get_agg_font > findfont: Matching > :family=sans-serif:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0 > to DejaVu Sans (/usr/share/fonts/dejavu/DejaVuSans.ttf) with score of 0.100000 > findfont: Matching > :family=STIXGeneral:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0 > to STIXGeneral (/usr/share/fonts/stix/STIXGeneral.otf) with score of 0.000000 > findfont: Could not match > :family=STIXSize1:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Matching > :family=STIXGeneral:style=normal:variant=normal:weight=bold:stretch=normal:size=12.0 > to STIXGeneral (/usr/share/fonts/stix/STIXGeneralBol.otf) with score of > 0.000000 > findfont: Could not match > :family=STIXSize3:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=STIXSize4:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=STIXSize5:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=STIXSize2:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Matching > :family=STIXGeneral:style=italic:variant=normal:weight=normal:stretch=normal:size=12.0 > to STIXGeneral (/usr/share/fonts/stix/STIXGeneralItalic.otf) with score of > 0.000000 > findfont: Could not match > :family=STIXNonUnicode:style=italic:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=STIXNonUnicode:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=STIXNonUnicode:style=normal:variant=normal:weight=bold:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=cmb10:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=cmtt10:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=cmmi10:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=cmex10:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=cmsy10:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=cmr10:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > findfont: Could not match > :family=cmss10:style=normal:variant=normal:weight=normal:stretch=normal:size=12.0. > Returning /usr/share/fonts/un-core/UnDotum.ttf > RendererAgg.draw_text > RendererAgg.draw_mathtext > >>>> > > > -- Michael Droettboom Science Software Branch Space Telescope Science Institute Baltimore, Maryland, USA |
|
From: Jorge S. <jor...@ya...> - 2010-08-05 07:48:44
|
Benjamin Root <ben.root@...> writes:
>
<snip>
> Probably not directly, but I hadn't thought about that before. For a set of
> scatter points that are colored by values, what should the legend show? In
> other words, what does it *mean* for there to be a legend for points that are
> colored in a potentially non-uniform manner?So, maybe this is desired behavior
> (but possibly by accident)?
> Thanks for your help,
> Ben Root
I thought for a moment that legend was using the color of the first point in the
set, but a quick test reveals that no matter what colormap you specify, the
marker color inside the legend is blue. BTW, I think I've found another thing
related to legend() and scatter plots: the 'numpoints' keyword argument to
legend is not respected, as showed in the example pasted below,
Jorge
-------
import numpy as np
import matplotlib as mpl
import matplotlib.pyplot as plt
data0 = np.random.rand(10,2)
data1 = np.random.rand(10,2)
data2 = np.random.rand(10,2)
data = [data0, data1, data2]
fig, ax = plt.subplots(1,1)
norm = mpl.colors.Normalize(0,len(data))
cmap = mpl.cm.afmhot
sc = []
labels = []
for i,d in enumerate(data):
sc.append(ax.scatter(d.T[0], d.T[1], c=np.ones(d.shape[0])*i,
norm=norm, cmap=cmap))
labels.append('data set ' + str(i))
ax.legend(sc, labels, numpoints=1)
plt.show()
-------
|
|
From: Gökhan S. <gok...@gm...> - 2010-08-05 01:41:04
|
On Wed, Aug 4, 2010 at 8:05 PM, Michael Hannon <jm_...@ya...> wrote: > > Wow, I hadn't realized that Fedora 13 is carrying a rather old version of > > matplotlib (~2 years old). I should double-check what version is in > rawhide > > and possibly prod some people to get them to choose a more recent > version... > > Hi, Ben. I think it would be a good idea to give the Fedora people some > feedback on this. I thought that one of the main points of Fedora was to > explore bleeding-edge software. > > Maybe, way in the future there will be source-based custom Fedora builds where all the OS code and the packages will be build from their repositories according to one's need. For the time being I like following these three easy steps on my FC12 for the latest matplotlib: svn co https://matplotlib.svn.sourceforge.net/svnroot/matplotlib/trunk/matplotlibmatplotlib python setupegg.py develop (one time only) svn up It's good to see some other fellow Fedora users around in these lists. It will somewhat off-the-topic but what are your impressions of Python and FC13 combination? > > > I am not exactly sure what the cause of your problem is, but you could > try > > uninstalling the Fedora packages of matplotlib and install the latest > > version from source. Unless someone else has a better idea about what > the > > cause of the problem is? > > I'm usually reluctant to do this, as the packages installed from source > don't > automatically get security updates, etc., but I tried your suggestion and > found the exercise painless. And with the new version I DO get math > symbols > on my plots. > > Thanks for your help with this. > > -- Mike > > > For the mathtext problem for inclusion of simple math texts you could easily construct your formulas or units using unicode text. Adding # -*- coding: utf-8 -*- on top of your scripts and then: plt.ylabel(u"π") will do the trick. > > > ------------------------------------------------------------------------------ > The Palm PDK Hot Apps Program offers developers who use the > Plug-In Development Kit to bring their C/C++ apps to Palm for a share > of $1 Million in cash or HP Products. Visit us here for more details: > http://p.sf.net/sfu/dev2dev-palm > _______________________________________________ > Matplotlib-users mailing list > Mat...@li... > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > > -- Gökhan |
|
From: Michael H. <jm_...@ya...> - 2010-08-05 01:05:19
|
> Wow, I hadn't realized that Fedora 13 is carrying a rather old version of
> matplotlib (~2 years old). I should double-check what version is in rawhide
> and possibly prod some people to get them to choose a more recent version...
Hi, Ben. I think it would be a good idea to give the Fedora people some
feedback on this. I thought that one of the main points of Fedora was to
explore bleeding-edge software.
> I am not exactly sure what the cause of your problem is, but you could try
> uninstalling the Fedora packages of matplotlib and install the latest
> version from source. Unless someone else has a better idea about what the
> cause of the problem is?
I'm usually reluctant to do this, as the packages installed from source don't
automatically get security updates, etc., but I tried your suggestion and
found the exercise painless. And with the new version I DO get math symbols
on my plots.
Thanks for your help with this.
-- Mike
|
