Re: [Matplotlib-users] Legend Marker Color Bug
On Sep 4, 2012, at 5:33PM, Jae-Joon Lee wrote:
On Wed, Sep 5, 2012 at 6:05 AM, Sterling Smith smit...@fusion.gat.com wrote:
I still do not get black markers. Furthermore, if you try to make a new
legend with the result of leg.get_lines(), you will get lines without
markers, which leads me to the conclusion I stated in my previous email
(which you did not copy)
I suspect that this is because the legend marker is drawn separately from
the legend line to accommodate the numpoints argument of the legend
functions. Then the question is how to access these markers if they are
separate from the line2d objects in the legend. I didn't even see them in
the children of the legend [legend.get_children()].
This is correct. To support legend handle like --o-- (i.e., no markers
at the ends), lines and markers are drawn as a separate artist. You
may use something like,
line[0]._legmarker.set_markerfacecolor('black')
line[1]._legmarker.set_markerfacecolor('black')
I, personally, recommend you to use a proxy artist.
http://matplotlib.sourceforge.net/users/legend_guide.html#using-proxy-artist
For example,
You may do something like
import pylab
pylab.plot(pylab.linspace(0,1,100),marker='o',ls='')
pylab.plot(pylab.linspace(0,1,100),marker='o',ls='-')
# creates artists for legend purpose only
l1, = pylab.plot(pylab.linspace(0,1,100), 'ko-')
l2, = pylab.plot(pylab.linspace(0,1,100), 'ko')
# remove them from the axes.
l1.remove()
l2.remove()
leg=pylab.legend([l1, l2], [Test 1, Test 2], loc='best')
Regards,
-JJ
JJ,
Thank you for responding. I was looking for the _legmarker method, which works
great.
Thanks,
Sterling
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Re: [Matplotlib-users] Legend Marker Color Bug
On Aug 31, 2012, at 11:29AM, Goyo wrote:
2012/8/30 Sterling Smith smit...@fusion.gat.com:
Thank you for taking the time to consider my question. I'm sorry that I
didn't pose my question correctly. I should have said: 'Consider the
_results_ of the following script:' I originally tried to attach the
results I obtained, which showed no change in color for the markers in the
legend, while the line connecting the markers in the legend did change color.
Actualy your question is correctly posted but I misread it. Calling
set_color changes only the line color, not the markers. This is
expected and documented behavoir. There are separate methods for the
markers:
line[0].set_markerfacecolor
line[0].set_markeredgecolor
See
http://matplotlib.sourceforge.net/api/artist_api.html#matplotlib.lines.Line2D
Regards
Goyo
Goyo,
Again I thank you for taking time to look into this. You are correct that
there are separate functions for setting the marker properties vs the line
properties. However, I have tried your solution, and it does not work. Given
the following code:
import pylab
pylab.plot(pylab.linspace(0,1,100),label='Test',marker='o',ls='')
pylab.plot(pylab.linspace(0,1,100),label='Test2',marker='o',ls='-')
leg=pylab.legend(loc='best')
line=leg.get_lines()
line[0].set_markerfacecolor('black')
line[1].set_markerfacecolor('black')
pylab.draw()
I still do not get black markers. Furthermore, if you try to make a new legend
with the result of leg.get_lines(), you will get lines without markers, which
leads me to the conclusion I stated in my previous email (which you did not
copy)
I suspect that this is because the legend marker is drawn separately from
the legend line to accommodate the numpoints argument of the legend
functions. Then the question is how to access these markers if they are
separate from the line2d objects in the legend. I didn't even see them in
the children of the legend [legend.get_children()].
Thanks,
Sterling
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threat landscape has changed and how IT managers can respond. Discussions
will include endpoint security, mobile security and the latest in malware
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Re: [Matplotlib-users] Legend Marker Color Bug
On Wed, Sep 5, 2012 at 6:05 AM, Sterling Smith smit...@fusion.gat.com wrote:
I still do not get black markers. Furthermore, if you try to make a new
legend with the result of leg.get_lines(), you will get lines without
markers, which leads me to the conclusion I stated in my previous email
(which you did not copy)
I suspect that this is because the legend marker is drawn separately from
the legend line to accommodate the numpoints argument of the legend
functions. Then the question is how to access these markers if they are
separate from the line2d objects in the legend. I didn't even see them in
the children of the legend [legend.get_children()].
This is correct. To support legend handle like --o-- (i.e., no markers
at the ends), lines and markers are drawn as a separate artist. You
may use something like,
line[0]._legmarker.set_markerfacecolor('black')
line[1]._legmarker.set_markerfacecolor('black')
I, personally, recommend you to use a proxy artist.
http://matplotlib.sourceforge.net/users/legend_guide.html#using-proxy-artist
For example,
You may do something like
import pylab
pylab.plot(pylab.linspace(0,1,100),marker='o',ls='')
pylab.plot(pylab.linspace(0,1,100),marker='o',ls='-')
# creates artists for legend purpose only
l1, = pylab.plot(pylab.linspace(0,1,100), 'ko-')
l2, = pylab.plot(pylab.linspace(0,1,100), 'ko')
# remove them from the axes.
l1.remove()
l2.remove()
leg=pylab.legend([l1, l2], [Test 1, Test 2], loc='best')
Regards,
-JJ
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Re: [Matplotlib-users] Legend Marker Color Bug
2012/8/30 Sterling Smith smit...@fusion.gat.com: Thank you for taking the time to consider my question. I'm sorry that I didn't pose my question correctly. I should have said: 'Consider the _results_ of the following script:' I originally tried to attach the results I obtained, which showed no change in color for the markers in the legend, while the line connecting the markers in the legend did change color. Actualy your question is correctly posted but I misread it. Calling set_color changes only the line color, not the markers. This is expected and documented behavoir. There are separate methods for the markers: line[0].set_markerfacecolor line[0].set_markeredgecolor See http://matplotlib.sourceforge.net/api/artist_api.html#matplotlib.lines.Line2D Regards Goyo -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Legend Marker Color Bug
2012/8/28 Sterling Smith smit...@fusion.gat.com:
List,
Consider the following script:
import pylab
pylab.plot(pylab.linspace(0,1,100),label='Test',marker='o',ls='')
pylab.plot(pylab.linspace(0,1,100),label='Test2',marker='o',ls='-')
leg=pylab.legend(loc='best')
line=leg.get_lines()
line[0].set_color('black')
line[1].set_color('black')
pylab.draw()
I am attaching the results I see with the TkAgg baackend. I am using version
1.1.0.
I would expect the markers to change colors also. However, I can't seem to
find the markers recorded in the legend object to be able to change them. Is
this a bug or a feature (resetting the color could lead to inconsistencies
between legend and plot)?
I think it's a design issue, there's no connection kept between plot
lines and the legend. You can change colors in the plot an then call
legend again instead.
Cheers
Goyo
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Re: [Matplotlib-users] Legend Marker Color Bug
On Thu, Aug 30, 2012 at 3:26 PM, Goyo goyod...@gmail.com wrote:
2012/8/28 Sterling Smith smit...@fusion.gat.com:
List,
Consider the following script:
import pylab
pylab.plot(pylab.linspace(0,1,100),label='Test',marker='o',ls='')
pylab.plot(pylab.linspace(0,1,100),label='Test2',marker='o',ls='-')
leg=pylab.legend(loc='best')
line=leg.get_lines()
line[0].set_color('black')
line[1].set_color('black')
pylab.draw()
I am attaching the results I see with the TkAgg baackend. I am using
version 1.1.0.
I would expect the markers to change colors also. However, I can't seem
to find the markers recorded in the legend object to be able to change
them. Is this a bug or a feature (resetting the color could lead to
inconsistencies between legend and plot)?
I think it's a design issue, there's no connection kept between plot
lines and the legend. You can change colors in the plot an then call
legend again instead.
Cheers
Goyo
That is correct. The lines that one obtains from the get_lines() method of
legend are completely new line objects. It is only upon the creation of
those lines (at legend creation) that the lines inherit the plot's line
properties.
Now, in the future, it would be nice for artist objects to have shareable
styles, in which case an edit to a style in one place effects all artists
with the same style object. But that might be something reserved for
version 2+.
Cheers!
Ben Root
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Re: [Matplotlib-users] Legend Marker Color Bug
On Aug 30, 2012, at 12:35PM, Benjamin Root wrote:
On Thu, Aug 30, 2012 at 3:26 PM, Goyo goyod...@gmail.com wrote:
2012/8/28 Sterling Smith smit...@fusion.gat.com:
List,
Consider the following script:
import pylab
pylab.plot(pylab.linspace(0,1,100),label='Test',marker='o',ls='')
pylab.plot(pylab.linspace(0,1,100),label='Test2',marker='o',ls='-')
leg=pylab.legend(loc='best')
line=leg.get_lines()
line[0].set_color('black')
line[1].set_color('black')
pylab.draw()
I am attaching the results I see with the TkAgg baackend. I am using
version 1.1.0.
I would expect the markers to change colors also. However, I can't seem to
find the markers recorded in the legend object to be able to change them.
Is this a bug or a feature (resetting the color could lead to
inconsistencies between legend and plot)?
I think it's a design issue, there's no connection kept between plot
lines and the legend. You can change colors in the plot an then call
legend again instead.
Cheers
Goyo
That is correct. The lines that one obtains from the get_lines() method of
legend are completely new line objects. It is only upon the creation of
those lines (at legend creation) that the lines inherit the plot's line
properties.
Now, in the future, it would be nice for artist objects to have shareable
styles, in which case an edit to a style in one place effects all artists
with the same style object. But that might be something reserved for version
2+.
Cheers!
Ben Root
Ben, Goyo,
Thank you for taking the time to consider my question. I'm sorry that I didn't
pose my question correctly. I should have said: 'Consider the _results_ of the
following script:' I originally tried to attach the results I obtained, which
showed no change in color for the markers in the legend, while the line
connecting the markers in the legend did change color.
I understand that the lines in the legend are new objects; this is desirable in
my case because I have the same symbol with different colors, where the color
means one thing (plasma condition), but the symbol means something else
(simulated vs measured). So it makes sense for the markers in the legend
describing the meaning of the symbols to be black, as opposed to any of the
colors of the markers. However, setting the legend's new line2d object color
properties does not change the appearance of the marker in the legend, only the
appearance of the line. I suspect that this is because the legend marker is
drawn separately from the legend line to accommodate the numpoints argument of
the legend functions. Then the question is how to access these markers if they
are separate from the line2d objects in the legend. I didn't even see them in
the children of the legend [legend.get_children()].
Thank you for your attention,
Sterling
--
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threat landscape has changed and how IT managers can respond. Discussions
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[Matplotlib-users] Legend Marker Color Bug
List,
Consider the following script:
import pylab
pylab.plot(pylab.linspace(0,1,100),label='Test',marker='o',ls='')
pylab.plot(pylab.linspace(0,1,100),label='Test2',marker='o',ls='-')
leg=pylab.legend(loc='best')
line=leg.get_lines()
line[0].set_color('black')
line[1].set_color('black')
pylab.draw()
I am attaching the results I see with the TkAgg baackend. I am using version
1.1.0.
I would expect the markers to change colors also. However, I can't seem to
find the markers recorded in the legend object to be able to change them. Is
this a bug or a feature (resetting the color could lead to inconsistencies
between legend and plot)?
Thanks,
Sterling
inline: legend_error.tiff--
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