Re: [Matplotlib-users] ginput with undefined number of points

[Fabrice S. <si...@lm...>]

Le jeudi 07 juin 2012 à 14:07 +0100, David Craig a écrit :
> Hi,
> I trying to define an area in a pcolor plot (several plots) using the 
> ginput(). However since it is an irregular shape and will be different 
> in each plot so I cant define how many points there will be before hand, 
> I've tried the following but it requires a double click at each point, 
> which I would like to avoid as it duplicates points
> 
> |x = randn(10,10)
> imshow(x)
> 
> button = False
> points = []
> while button == False:
>      points.append(ginput(1))
>      button = waitforbuttonpress()
> |
> 
> Anyone know a better way to go about this??
> thanks
> Dave

ginput has a way to do it. From docs:
        If n is zero or negative, accumulate clicks until a middle click
        (or potentially both mouse buttons at once) terminates the
        input.

http://matplotlib.sourceforge.net/api/pyplot_api.html#matplotlib.pyplot.ginput
Pressing [enter] also terminates the points acquisition.
-- 
Fabrice Silva <si...@lm...>
LMA UPR CNRS 7051