Re: [Matplotlib-users] bug in set_yscale of bar graphs?
thanks to all for the replies. i am still having an issue with the log
scale of these plots. i am trying to hide the top and right axes of
the plot, since these should not be there when plotting a histogram or
a line plot. i use the following code:
import matplotlib
matplotlib.use('PDF')
import matplotlib.pyplot as plt
from matplotlib import rc
rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
plt.rcParams['ps.useafm'] = True
rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
plt.rcParams['pdf.fonttype'] = 42
plt.rcParams['font.size'] = 10
from mpl_toolkits.axes_grid.axislines import SubplotZero
fig = plt.figure(figsize=(5, 5), dpi=300)
ax = SubplotZero(fig, 1, 1, 1)
ax = fig.add_subplot(ax)
x = range(1, 11)
y = [5000, 900, 600, 500, 200, 110, 50, 20, 10, 5]
plt.plot(x, y, linewidth=1.5, c='k')
ax = plt.gca()
ax.set_yscale('log')
ax.axis[xzero].set_visible(True)
# make other axis (bottom, top, right) invisible.
invisible = [bottom, top, right]
for n in invisible:
ax.axis[n].set_visible(False)
plt.savefig('test_logscale.pdf')
if i do this, the bottom x-axis labels disappear.
this only happens with SubplotZero -- which is needed to make the
irrelevant axes invisible, I think -- then the labels of the x-axis
disappear.
any idea how this can be fixed? i want those axes removed but i still
want the labels/ticks of the bottom x-axis to show.
thanks.
On 11/11/09, Gökhan Sever gokhanse...@gmail.com wrote:
On Wed, Nov 11, 2009 at 4:25 PM, per freem perfr...@gmail.com wrote:
hi all,
I am trying to make a simple bar graph that has its yaxis scale set to
log. I use the following code:
import matplotlib
matplotlib.use('PDF')
import matplotlib.pyplot as plt
from matplotlib import rc
rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
plt.rcParams['ps.useafm'] = True
rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
plt.rcParams['pdf.fonttype'] = 42
plt.rcParams['font.size'] = 10
x = range(1, 11)
y = [5000, 900, 600, 500, 200, 110, 50, 20, 10, 5]
plt.figure(figsize=(5, 5), dpi=300)
plt.bar(x, y)
It should work scaling from within the bar()
plt.bar(x, y, log=True)
# plt.gca().set_yscale('log')
plt.savefig('test_logscale.pdf')
the problem is that the bar graphs do not appear -- instead, i simply
get horizontal lines around where the top of the bar graph should
appear. Any idea how to fix this?
also, sometimes the x axis disappears when i try this. thanks.
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Re: [Matplotlib-users] bug in set_yscale of bar graphs?
On Thu, Nov 12, 2009 at 12:07 PM, per freem perfr...@gmail.com wrote:
ax.axis[xzero].set_visible(True)
# make other axis (bottom, top, right) invisible.
The ax.axis[xzero] is drawn along the y=0 line. Therefore, if you
use logscale, this axis become invisible.
invisible = [bottom, top, right]
for n in invisible:
ax.axis[n].set_visible(False)
Is there any reason that you have to use SubplotZero? If you intend to
use it, you need to place the xzero axes not at y=0, but at some
meaningful location.
However, I think you're good without SubplotZero. Just use Subplot,
but do not make bottom axis invisible (see the example below).
On the other hand, I recommend you to consider using spines instead of
axes_grid toolkits.
http://matplotlib.sourceforge.net/examples/pylab_examples/spine_placement_demo.html
Regards,
-JJ
from mpl_toolkits.axes_grid.axislines import Subplot
fig = plt.figure(figsize=(5, 5), dpi=100)
ax = Subplot(fig, 1, 1, 1)
ax = fig.add_subplot(ax)
x = range(1, 11)
y = [5000, 900, 600, 500, 200, 110, 50, 20, 10, 5]
plt.plot(x, y, linewidth=1.5, c='k')
ax = plt.gca()
ax.set_yscale('log')
invisible = [top, right]
for n in invisible:
ax.axis[n].set_visible(False)
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Re: [Matplotlib-users] bug in set_yscale of bar graphs?
The bar command makes rectangles whose bottom position is 0.
The reason that bars disappear when you set log scale is that bottom
position of the bar become -infinity.
You may
* set log scale before calling the bar
or
* create bar plot but with reasonable (positive) bottom value. Take
a look at the docs.
Regards,
-JJ
On Wed, Nov 11, 2009 at 5:25 PM, per freem perfr...@gmail.com wrote:
hi all,
I am trying to make a simple bar graph that has its yaxis scale set to
log. I use the following code:
import matplotlib
matplotlib.use('PDF')
import matplotlib.pyplot as plt
from matplotlib import rc
rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
plt.rcParams['ps.useafm'] = True
rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
plt.rcParams['pdf.fonttype'] = 42
plt.rcParams['font.size'] = 10
x = range(1, 11)
y = [5000, 900, 600, 500, 200, 110, 50, 20, 10, 5]
plt.figure(figsize=(5, 5), dpi=300)
plt.bar(x, y)
plt.gca().set_yscale('log')
plt.savefig('test_logscale.pdf')
the problem is that the bar graphs do not appear -- instead, i simply
get horizontal lines around where the top of the bar graph should
appear. Any idea how to fix this?
also, sometimes the x axis disappears when i try this. thanks.
--
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trial. Simplify your report design, integration and deployment - and focus on
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Re: [Matplotlib-users] bug in set_yscale of bar graphs?
On Wed, Nov 11, 2009 at 4:25 PM, per freem perfr...@gmail.com wrote:
hi all,
I am trying to make a simple bar graph that has its yaxis scale set to
log. I use the following code:
import matplotlib
matplotlib.use('PDF')
import matplotlib.pyplot as plt
from matplotlib import rc
rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
plt.rcParams['ps.useafm'] = True
rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
plt.rcParams['pdf.fonttype'] = 42
plt.rcParams['font.size'] = 10
x = range(1, 11)
y = [5000, 900, 600, 500, 200, 110, 50, 20, 10, 5]
plt.figure(figsize=(5, 5), dpi=300)
plt.bar(x, y)
It should work scaling from within the bar()
plt.bar(x, y, log=True)
# plt.gca().set_yscale('log')
plt.savefig('test_logscale.pdf')
the problem is that the bar graphs do not appear -- instead, i simply
get horizontal lines around where the top of the bar graph should
appear. Any idea how to fix this?
also, sometimes the x axis disappears when i try this. thanks.
--
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
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Gökhan
--
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