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This appears to be DPI dependent.

Changing the last line of Richard's example to

plt.savefig("grap.png")

gives a PNG with a shadow similar to that generated by TkAgg.

--Mark

On 09/03/2015 01:17 PM, Sterling Smith wrote:
> For those who wonder what he means:
> on the left is TkAgg; on the right is png.
>
> -Sterling
>
> On Sep 3, 2015, at 1:13PM, Richard Stanton <st...@ha...
> <mailto:st...@ha...>> wrote:
>
>> A quick follow-up: if I export to a jpg file, I get the same huge shadow. If I
>> export to a PDF file, the shadow looks much more like it does on the screen.
>>
>>
>>> On Sep 3, 2015, at 1:07 PM, Richard Stanton <st...@ha...
>>> <mailto:st...@ha...>> wrote:
>>>
>>> I’m trying to create a pie chart for a presentation. If I turn on shadows,
>>> they look fine on the screen (in an IPython notebook), but when I export the
>>> file to a PNG file, the shadow is way larger, and looks pretty ugly. Is this
>>> a bug? And is there a way to shrink the size of the shadow?
>>>
>>> Here’s some sample code that shows the problem:
>>>
>>> import matplotlib.pyplot as plt
>>> numbers = [4380.0, 2474.0, 158]
>>> explode=(0, 0, 0.5)
>>> plt.pie(numbers, explode=explode,shadow=True)
>>> plt.axis('equal')
>>> plt.savefig(‘grap.png’, dpi=400)
>>>
>>> Thanks for any suggestions.
>>>
>>> By the way, I’m using Matplotlib version 1.4.3 with the Anaconda distribution
>>> under OS X.
>>>
>>> Richard Stanton
>>
>>
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For those who wonder what he means: 

on the left is TkAgg; on the right is png.

-Sterling

On Sep 3, 2015, at 1:13PM, Richard Stanton <st...@ha...> wrote:

> A quick follow-up: if I export to a jpg file, I get the same huge shadow. If I export to a PDF file, the shadow looks much more like it does on the screen.
> 
> 
>> On Sep 3, 2015, at 1:07 PM, Richard Stanton <st...@ha...> wrote:
>> 
>> I’m trying to create a pie chart for a presentation. If I turn on shadows, they look fine on the screen (in an IPython notebook), but when I export the file to a PNG file, the shadow is way larger, and looks pretty ugly. Is this a bug? And is there a way to shrink the size of the shadow? 
>> 
>> Here’s some sample code that shows the problem:
>> 
>> import matplotlib.pyplot as plt
>> numbers = [4380.0, 2474.0, 158]
>> explode=(0, 0, 0.5)
>> plt.pie(numbers, explode=explode,shadow=True)
>> plt.axis('equal')
>> plt.savefig(‘grap.png’, dpi=400)
>> 
>> Thanks for any suggestions.
>> 
>> By the way, I’m using Matplotlib version 1.4.3 with the Anaconda distribution under OS X.
>> 
>> Richard Stanton
> 
> 
> ------------------------------------------------------------------------------
> Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
> Get real-time metrics from all of your servers, apps and tools
> in one place.
> SourceForge users - Click here to start your Free Trial of Datadog now!
> http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140
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> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

A quick follow-up: if I export to a jpg file, I get the same huge shadow. If I export to a PDF file, the shadow looks much more like it does on the screen.


> On Sep 3, 2015, at 1:07 PM, Richard Stanton <st...@ha...> wrote:
> 
> I’m trying to create a pie chart for a presentation. If I turn on shadows, they look fine on the screen (in an IPython notebook), but when I export the file to a PNG file, the shadow is way larger, and looks pretty ugly. Is this a bug? And is there a way to shrink the size of the shadow? 
> 
> Here’s some sample code that shows the problem:
> 
> import matplotlib.pyplot as plt
> numbers = [4380.0, 2474.0, 158]
> explode=(0, 0, 0.5)
> plt.pie(numbers, explode=explode,shadow=True)
> plt.axis('equal')
> plt.savefig(‘grap.png’, dpi=400)
> 
> Thanks for any suggestions.
> 
> By the way, I’m using Matplotlib version 1.4.3 with the Anaconda distribution under OS X.
> 
> Richard Stanton

I’m trying to create a pie chart for a presentation. If I turn on shadows, they look fine on the screen (in an IPython notebook), but when I export the file to a PNG file, the shadow is way larger, and looks pretty ugly. Is this a bug? And is there a way to shrink the size of the shadow? 

Here’s some sample code that shows the problem:

import matplotlib.pyplot as plt
numbers = [4380.0, 2474.0, 158]
explode=(0, 0, 0.5)
plt.pie(numbers, explode=explode,shadow=True)
plt.axis('equal')
plt.savefig(‘grap.png’, dpi=400)

Thanks for any suggestions.

By the way, I’m using Matplotlib version 1.4.3 with the Anaconda distribution under OS X.

Richard Stanton