Thread: [Matplotlib-users] png is clipped

Hi,

I am trying to generate some pngs without using the GUI interface using the
AGG backend. The problem is when I set figsize, the bottom part of the
x-axis label is clipped. I am using python 2.5 in windows XP. I just
installed the lastest version of matplotlib today version 0.98.3. Below is
the code that produces two images that both have this problem.

from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure

fname1=r'C:\Documents and Settings\CCM\Desktop\test_plot1.png'
fname2=r'C:\Documents and Settings\CCM\Desktop\test_plot2.png'

fig = Figure(figsize=(4,3))
canvas = FigureCanvas(fig)
ax = fig.add_subplot(111)
ax.set_clip_box(None)
ax.plot([1,2,3])
ax.set_title('hi mom')
ax.grid(True)
ax.set_xlabel('time')
ax.set_ylabel('volts')
print fig.get_size_inches()
canvas.print_figure(fname1,dpi=200)
fig.savefig(fname2)
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On Tue, Jan 26, 2010 at 12:00 PM, cwurld <cw...@ya...> wrote:
>
> Hi,
>
> I am trying to generate some pngs without using the GUI interface using the
> AGG backend. The problem is when I set figsize, the bottom part of the
> x-axis label is clipped. I am using python 2.5 in windows XP. I just
> installed the lastest version of matplotlib today version 0.98.3. Below is
> the code that produces two images that both have this problem.


Try setting

fig.subplots_adjust(bottom=0.2)

The default is 0.1

JDH

If you do not mind the output size slightly adjusted, try

 savefig("somename.png", bbox_inches="tight")

Regards,

-JJ


On Tue, Jan 26, 2010 at 3:27 PM, John Hunter <jd...@gm...> wrote:
> On Tue, Jan 26, 2010 at 12:00 PM, cwurld <cw...@ya...> wrote:
>>
>> Hi,
>>
>> I am trying to generate some pngs without using the GUI interface using the
>> AGG backend. The problem is when I set figsize, the bottom part of the
>> x-axis label is clipped. I am using python 2.5 in windows XP. I just
>> installed the lastest version of matplotlib today version 0.98.3. Below is
>> the code that produces two images that both have this problem.
>
>
> Try setting
>
> fig.subplots_adjust(bottom=0.2)
>
> The default is 0.1
>
> JDH
>
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Jae-Joon Lee wrote:
> 
> savefig("somename.png", bbox_inches="tight")
> 

I tried it and it did NOT solve the problem. The
"fig.subplots_adjust(bottom=0.2)" solution did solve the problem.

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Another way to solve this problem is to not use the figsize keyword when
creating the Figure. Instead only adjust the dpi. For example:

w,h=fig.get_size_inches()
target_width_pix=300
dpi=target_width_pix/w
canvas.print_figure(fname1,dpi=dpi)


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