Re: [Matplotlib-users] Scatter legend with colored marker
Benjamin Root writes:
>
> 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()
---
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Re: [Matplotlib-users] Problem getting math symbols into text
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() > > text(0.5, 0.5, r'$\pi$') > > 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 > 0.10 > 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 > 0.10 > 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 > 0.00 > 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 > 0.00 > findfont: Could not
Re: [Matplotlib-users] Scatter legend with colored marker
On Thu, Aug 5, 2010 at 2:48 AM, Jorge Scandaliaris
wrote:
> Benjamin Root writes:
> >
>
> > 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
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Re: [Matplotlib-users] Scatter legend with colored marker
On Thu, Aug 5, 2010 at 4:48 PM, Jorge Scandaliaris wrote: > 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 In recent versions, there is a separate parameter : scatterpoints. So check your document. ax.legend(sc, labels, scatterpoints=1) Regards, -JJ -- This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
