Thread: [matplotlib-devel] picker inpoerative on scatter markers x, + (those with zero area)

Cannot pick markers '+','x' or others with zero area in plots made by
pyplot.scatter

The example below 
http://old.nabble.com/file/p31305303/picker_example_scatter.py
picker_example_scatter.py  is from the matplotlib docs, but modified to use
scatter instead of plot (which works fine).
http://matplotlib.sourceforge.net/users/event_handling.html#picking-exercise

run picker_example_scatter.py
<will not respond to any picks>
edit code replace 'x' with 'o'
<Works, but only if click is inside marker - i.e. ignores picker value.>

See also
http://old.nabble.com/Can't-pick-on-various-scatter-markers-tp19140977p19140977.html
which describes the same problem.

Ububtu 10.04 LTS
matplotlib 0.99.1.1 
Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56) 


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On 04/02/2011 02:48 PM, bdb112 wrote:
>
> Cannot pick markers '+','x' or others with zero area in plots made by
> pyplot.scatter
>
> The example below
> http://old.nabble.com/file/p31305303/picker_example_scatter.py
> picker_example_scatter.py  is from the matplotlib docs, but modified to use
> scatter instead of plot (which works fine).
> http://matplotlib.sourceforge.net/users/event_handling.html#picking-exercise
>
> run picker_example_scatter.py
> <will not respond to any picks>
> edit code replace 'x' with 'o'
> <Works, but only if click is inside marker - i.e. ignores picker value.>
>
> See also
> http://old.nabble.com/Can't-pick-on-various-scatter-markers-tp19140977p19140977.html
> which describes the same problem.

The bug is verified in 1.0.x.  I have looked around, but haven't figured 
it out yet.

Eric

>
> Ububtu 10.04 LTS
> matplotlib 0.99.1.1
> Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56)
>
>

On 04/02/2011 02:48 PM, bdb112 wrote:
>
> Cannot pick markers '+','x' or others with zero area in plots made by
> pyplot.scatter
>
> The example below
> http://old.nabble.com/file/p31305303/picker_example_scatter.py
> picker_example_scatter.py  is from the matplotlib docs, but modified to use
> scatter instead of plot (which works fine).
> http://matplotlib.sourceforge.net/users/event_handling.html#picking-exercise
>
> run picker_example_scatter.py
> <will not respond to any picks>
> edit code replace 'x' with 'o'
> <Works, but only if click is inside marker - i.e. ignores picker value.>
>
> See also
> http://old.nabble.com/Can't-pick-on-various-scatter-markers-tp19140977p19140977.html
> which describes the same problem.
>
> Ububtu 10.04 LTS
> matplotlib 0.99.1.1
> Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56)
>
>

See https://github.com/matplotlib/matplotlib/pull/72 for a possible 
solution.

Eric

Tried the fix over a 1.0.0 installation a few months old and it works, but
there are issues with blocking, which I have encountered before.  
I will try on the current snapshot, and also adapt your fix to a 0.99
release which has a blocking behaviour that I understand better.


efiring wrote:
> 
> On 04/02/2011 02:48 PM, bdb112 wrote:
>>
>> Cannot pick markers '+','x' or others with zero area in plots made by
>> pyplot.scatter
>>
>> The example below
>> http://old.nabble.com/file/p31305303/picker_example_scatter.py
>> picker_example_scatter.py  is from the matplotlib docs, but modified to
>> use
>> scatter instead of plot (which works fine).
>> http://matplotlib.sourceforge.net/users/event_handling.html#picking-exercise
>>
>> run picker_example_scatter.py
>> <will not respond to any picks>
>> edit code replace 'x' with 'o'
>> <Works, but only if click is inside marker - i.e. ignores picker value.>
>>
>> See also
>> http://old.nabble.com/Can't-pick-on-various-scatter-markers-tp19140977p19140977.html
>> which describes the same problem.
>>
>> Ububtu 10.04 LTS
>> matplotlib 0.99.1.1
>> Python 2.6.5 (r265:79063, Apr 16 2010, 13:09:56)
>>
>>
> 
> See https://github.com/matplotlib/matplotlib/pull/72 for a possible 
> solution.
> 
> Eric
> 
> 
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