[Matplotlib-users] Horizontal bar chart with log x-axis, no filled boxes
I'm running into something odd in Matplotlib 1.1. In drawing a horizontal bar chart (barh), if the x-axis scale is set to log, the rectangles are not drawn and filled; I just get small ticks at the right-hand position where the rectangle should end. Interestingly, if I add a second, stacked barh to the same axes, that second set of rectangles draws fine, even though the first does not. If I simply comment out the call setting the x axis to log, it works properly. Any thoughts? -- -- Christophe Pettus x...@thebuild.com -- RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Horizontal bar chart with log x-axis, no filled boxes
On Thu, Jan 12, 2012 at 9:03 AM, Christophe Pettus x...@thebuild.com wrote: I'm running into something odd in Matplotlib 1.1. In drawing a horizontal bar chart (barh), if the x-axis scale is set to log, the rectangles are not drawn and filled; I just get small ticks at the right-hand position where the rectangle should end. Interestingly, if I add a second, stacked barh to the same axes, that second set of rectangles draws fine, even though the first does not. If I simply comment out the call setting the x axis to log, it works properly. Any thoughts? Does everything work correctly if it is vertical? In other words, use bar() and set the y-axis to log scale? An example script would be useful. Ben Root -- RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Horizontal bar chart with log x-axis, no filled boxes
On Jan 12, 2012, at 7:38 AM, Benjamin Root wrote:
Does everything work correctly if it is vertical? In other words, use bar()
and set the y-axis to log scale? An example script would be useful.
No, it doesn't appear to work as a vertical bar chart, either.
I've attached a test case below. The results I get running it with the X-axis
as log are:
http://thebuild.com/matlabtest/matlabtest-log.pdf
Commenting out the call to ax.set_xscale('log') gives me:
http://thebuild.com/matlabtest/matlabtest.pdf
Thanks!
--
import numpy as np
import matplotlib
from matplotlib.font_manager import FontProperties
import random
matplotlib.use('PDF')
import matplotlib.pyplot as plot
small_font = FontProperties()
small_font.set_size('xx-small')
ind = np.arange(20)
label = [ str(r) for r in ind ]
data1 = [ float(random.random()*1) for r in ind ]
data2 = [ float(random.random()*1) for r in ind ]
width = 0.25
fig = plot.figure()
ax = fig.add_subplot(111)
ax.set_title('Table Title')
ax.set_xlabel('X Label')
ax.barh(ind, data1, width, linewidth=0, color='blue')
ax.barh(ind, data2, width, left=data1, linewidth=0, color='yellow')
ax.set_yticks(ind + width/2)
ax.set_yticklabels(label, fontproperties=small_font)
ax.set_xscale('log')
plot.savefig('matlabtest-log.pdf')
--
-- Christophe Pettus
x...@thebuild.com
--
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Mar 27 - Feb 2
Save $400 by Jan. 27
Register now!
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Re: [Matplotlib-users] Horizontal bar chart with log x-axis, no filled boxes
On Thu, Jan 12, 2012 at 11:39 AM, Christophe Pettus x...@thebuild.comwrote:
On Jan 12, 2012, at 7:38 AM, Benjamin Root wrote:
Does everything work correctly if it is vertical? In other words, use
bar() and set the y-axis to log scale? An example script would be useful.
No, it doesn't appear to work as a vertical bar chart, either.
I've attached a test case below. The results I get running it with the
X-axis as log are:
http://thebuild.com/matlabtest/matlabtest-log.pdf
Commenting out the call to ax.set_xscale('log') gives me:
http://thebuild.com/matlabtest/matlabtest.pdf
Thanks!
--
import numpy as np
import matplotlib
from matplotlib.font_manager import FontProperties
import random
matplotlib.use('PDF')
import matplotlib.pyplot as plot
small_font = FontProperties()
small_font.set_size('xx-small')
ind = np.arange(20)
label = [ str(r) for r in ind ]
data1 = [ float(random.random()*1) for r in ind ]
data2 = [ float(random.random()*1) for r in ind ]
width = 0.25
fig = plot.figure()
ax = fig.add_subplot(111)
ax.set_title('Table Title')
ax.set_xlabel('X Label')
ax.barh(ind, data1, width, linewidth=0, color='blue')
ax.barh(ind, data2, width, left=data1, linewidth=0, color='yellow')
ax.set_yticks(ind + width/2)
ax.set_yticklabels(label, fontproperties=small_font)
ax.set_xscale('log')
plot.savefig('matlabtest-log.pdf')
--
-- Christophe Pettus
Isn't this just because zero isn't defined in log scale? The second set of
data plots fine because it doesn't start at zero, but it isn't obvious what
to do with the first set of data. If you just want to make this work, you
can set the left parameter of the first `barh` call to some constant; for
example:
origin = 10**np.floor(np.log10(np.min(data1)))
ax.barh(ind, data1, width, left=origin, linewidth=0, color='blue')
-Tony
--
RSA(R) Conference 2012
Mar 27 - Feb 2
Save $400 by Jan. 27
Register now!
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Re: [Matplotlib-users] Horizontal bar chart with log x-axis, no filled boxes
On Thu, Jan 12, 2012 at 11:04 AM, Tony Yu tsy...@gmail.com wrote:
On Thu, Jan 12, 2012 at 11:39 AM, Christophe Pettus x...@thebuild.comwrote:
On Jan 12, 2012, at 7:38 AM, Benjamin Root wrote:
Does everything work correctly if it is vertical? In other words, use
bar() and set the y-axis to log scale? An example script would be useful.
No, it doesn't appear to work as a vertical bar chart, either.
I've attached a test case below. The results I get running it with the
X-axis as log are:
http://thebuild.com/matlabtest/matlabtest-log.pdf
Commenting out the call to ax.set_xscale('log') gives me:
http://thebuild.com/matlabtest/matlabtest.pdf
Thanks!
--
import numpy as np
import matplotlib
from matplotlib.font_manager import FontProperties
import random
matplotlib.use('PDF')
import matplotlib.pyplot as plot
small_font = FontProperties()
small_font.set_size('xx-small')
ind = np.arange(20)
label = [ str(r) for r in ind ]
data1 = [ float(random.random()*1) for r in ind ]
data2 = [ float(random.random()*1) for r in ind ]
width = 0.25
fig = plot.figure()
ax = fig.add_subplot(111)
ax.set_title('Table Title')
ax.set_xlabel('X Label')
ax.barh(ind, data1, width, linewidth=0, color='blue')
ax.barh(ind, data2, width, left=data1, linewidth=0, color='yellow')
ax.set_yticks(ind + width/2)
ax.set_yticklabels(label, fontproperties=small_font)
ax.set_xscale('log')
plot.savefig('matlabtest-log.pdf')
--
-- Christophe Pettus
Isn't this just because zero isn't defined in log scale? The second set of
data plots fine because it doesn't start at zero, but it isn't obvious what
to do with the first set of data. If you just want to make this work, you
can set the left parameter of the first `barh` call to some constant; for
example:
origin = 10**np.floor(np.log10(np.min(data1)))
ax.barh(ind, data1, width, left=origin, linewidth=0, color='blue')
-Tony
Right, but I could have sworn that we got this fixed at some point. There
is logic in the bar() function to detect logscale and handle it
appropriately. But I don't know what is not working here.
Ben Root
--
RSA(R) Conference 2012
Mar 27 - Feb 2
Save $400 by Jan. 27
Register now!
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Matplotlib-users mailing list
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Re: [Matplotlib-users] Horizontal bar chart with log x-axis, no filled boxes
On Thu, Jan 12, 2012 at 12:14 PM, Benjamin Root ben.r...@ou.edu wrote:
On Thu, Jan 12, 2012 at 11:04 AM, Tony Yu tsy...@gmail.com wrote:
On Thu, Jan 12, 2012 at 11:39 AM, Christophe Pettus x...@thebuild.comwrote:
On Jan 12, 2012, at 7:38 AM, Benjamin Root wrote:
Does everything work correctly if it is vertical? In other words, use
bar() and set the y-axis to log scale? An example script would be useful.
No, it doesn't appear to work as a vertical bar chart, either.
I've attached a test case below. The results I get running it with the
X-axis as log are:
http://thebuild.com/matlabtest/matlabtest-log.pdf
Commenting out the call to ax.set_xscale('log') gives me:
http://thebuild.com/matlabtest/matlabtest.pdf
Thanks!
--
import numpy as np
import matplotlib
from matplotlib.font_manager import FontProperties
import random
matplotlib.use('PDF')
import matplotlib.pyplot as plot
small_font = FontProperties()
small_font.set_size('xx-small')
ind = np.arange(20)
label = [ str(r) for r in ind ]
data1 = [ float(random.random()*1) for r in ind ]
data2 = [ float(random.random()*1) for r in ind ]
width = 0.25
fig = plot.figure()
ax = fig.add_subplot(111)
ax.set_title('Table Title')
ax.set_xlabel('X Label')
ax.barh(ind, data1, width, linewidth=0, color='blue')
ax.barh(ind, data2, width, left=data1, linewidth=0, color='yellow')
ax.set_yticks(ind + width/2)
ax.set_yticklabels(label, fontproperties=small_font)
ax.set_xscale('log')
plot.savefig('matlabtest-log.pdf')
--
-- Christophe Pettus
Isn't this just because zero isn't defined in log scale? The second set
of data plots fine because it doesn't start at zero, but it isn't obvious
what to do with the first set of data. If you just want to make this work,
you can set the left parameter of the first `barh` call to some constant;
for example:
origin = 10**np.floor(np.log10(np.min(data1)))
ax.barh(ind, data1, width, left=origin, linewidth=0, color='blue')
-Tony
Right, but I could have sworn that we got this fixed at some point. There
is logic in the bar() function to detect logscale and handle it
appropriately. But I don't know what is not working here.
Ben Root
Ahh, I didn't know this. It looks like setting `log=True` in `barh` works.
-Tony
--
RSA(R) Conference 2012
Mar 27 - Feb 2
Save $400 by Jan. 27
Register now!
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Re: [Matplotlib-users] Horizontal bar chart with log x-axis, no filled boxes
I think this is because the bar is going from zero to your value, so the left edge of the rectangle becomes log(0). I see this when using the 'k' and 'l' keys to interactively put a histogram on a log scale. Passing in log=True for hist fixes this. I'm sure there's something similar that can be done for bar/barh. G On Thu, Jan 12, 2012 at 7:03 AM, Christophe Pettus x...@thebuild.com wrote: I'm running into something odd in Matplotlib 1.1. In drawing a horizontal bar chart (barh), if the x-axis scale is set to log, the rectangles are not drawn and filled; I just get small ticks at the right-hand position where the rectangle should end. Interestingly, if I add a second, stacked barh to the same axes, that second set of rectangles draws fine, even though the first does not. If I simply comment out the call setting the x axis to log, it works properly. Any thoughts? -- -- Christophe Pettus x...@thebuild.com -- RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- RSA(R) Conference 2012 Mar 27 - Feb 2 Save $400 by Jan. 27 Register now! http://p.sf.net/sfu/rsa-sfdev2dev2___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Horizontal bar chart with log x-axis, no filled boxes
On Thu, Jan 12, 2012 at 11:20 AM, Tony Yu tsy...@gmail.com wrote:
On Thu, Jan 12, 2012 at 12:14 PM, Benjamin Root ben.r...@ou.edu wrote:
On Thu, Jan 12, 2012 at 11:04 AM, Tony Yu tsy...@gmail.com wrote:
On Thu, Jan 12, 2012 at 11:39 AM, Christophe Pettus
x...@thebuild.comwrote:
On Jan 12, 2012, at 7:38 AM, Benjamin Root wrote:
Does everything work correctly if it is vertical? In other words,
use bar() and set the y-axis to log scale? An example script would be
useful.
No, it doesn't appear to work as a vertical bar chart, either.
I've attached a test case below. The results I get running it with the
X-axis as log are:
http://thebuild.com/matlabtest/matlabtest-log.pdf
Commenting out the call to ax.set_xscale('log') gives me:
http://thebuild.com/matlabtest/matlabtest.pdf
Thanks!
--
import numpy as np
import matplotlib
from matplotlib.font_manager import FontProperties
import random
matplotlib.use('PDF')
import matplotlib.pyplot as plot
small_font = FontProperties()
small_font.set_size('xx-small')
ind = np.arange(20)
label = [ str(r) for r in ind ]
data1 = [ float(random.random()*1) for r in ind ]
data2 = [ float(random.random()*1) for r in ind ]
width = 0.25
fig = plot.figure()
ax = fig.add_subplot(111)
ax.set_title('Table Title')
ax.set_xlabel('X Label')
ax.barh(ind, data1, width, linewidth=0, color='blue')
ax.barh(ind, data2, width, left=data1, linewidth=0, color='yellow')
ax.set_yticks(ind + width/2)
ax.set_yticklabels(label, fontproperties=small_font)
ax.set_xscale('log')
plot.savefig('matlabtest-log.pdf')
--
-- Christophe Pettus
Isn't this just because zero isn't defined in log scale? The second set
of data plots fine because it doesn't start at zero, but it isn't obvious
what to do with the first set of data. If you just want to make this work,
you can set the left parameter of the first `barh` call to some constant;
for example:
origin = 10**np.floor(np.log10(np.min(data1)))
ax.barh(ind, data1, width, left=origin, linewidth=0, color='blue')
-Tony
Right, but I could have sworn that we got this fixed at some point.
There is logic in the bar() function to detect logscale and handle it
appropriately. But I don't know what is not working here.
Ben Root
Ahh, I didn't know this. It looks like setting `log=True` in `barh` works.
-Tony
D'oh! Of course, I missed that tiny little detail. Hmm, so the
auto-detection would have been useless in this case because the scale of
the axes was set after the fact.
Maybe the log kwarg should be in a more prominent location in the
docstring?
Ben Root
--
RSA(R) Conference 2012
Mar 27 - Feb 2
Save $400 by Jan. 27
Register now!
http://p.sf.net/sfu/rsa-sfdev2dev2___
Matplotlib-users mailing list
Matplotlib-users@lists.sourceforge.net
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Re: [Matplotlib-users] Horizontal bar chart with log x-axis, no filled boxes
On Jan 12, 2012, at 9:31 AM, Benjamin Root wrote:
D'oh! Of course, I missed that tiny little detail. Hmm, so the
auto-detection would have been useless in this case because the scale of the
axes was set after the fact.
Maybe the log kwarg should be in a more prominent location in the docstring?
Moving the call to set_xscale('log') to before the calls to barh fixes the
problem nicely... thank you!
--
-- Christophe Pettus
x...@thebuild.com
--
RSA(R) Conference 2012
Mar 27 - Feb 2
Save $400 by Jan. 27
Register now!
http://p.sf.net/sfu/rsa-sfdev2dev2
___
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