Re: [Matplotlib-users] pick event for images

[Nils W. <ni...@go...>]

Hi Joe,

Just now I installed your package mpldatacursor and run the example
image_example.py.
Awesome !
Is there a chance to integrate it into matplotlib ?

Nils



On Wed, Oct 30, 2013 at 5:58 PM, Joe Kington <jof...@gm...> wrote:

>
> On Oct 30, 2013 9:43 AM, "Nils Wagner" <ni...@go...> wrote:
> >
> > Hi all,
> >
> > How can I retrieve the corresponding "color value" in percent, when I
> click on the image ?
> >
>
> You have to jump through a couple of hoops.
>
> Have a look at the _coords2index function in pick_info.py for
> mpldatacursor.
> https://github.com/joferkington/mpldatacursor/blob/master/mpldatacursor/pick_info.py
>
> Also, mpldatacursor might be useful for what you're doing. Not to plug my
> own project too much, but it does exactly this, among other things.
>
> Hope that helps!
> -Joe
>
> > fig = plt.figure()
> > ax  = fig.add_subplot(111)
> > cax = ax.imshow(col[:,::2],
> interpolation='nearest',extent=[0.5,20.5,0.5,2
> > 0.5],alpha=1,picker=5)
> >
> > fig.canvas.mpl_connect('pick_event', onpick)
> >
> > def onpick(event):
> >  ...
> >
> >
> > Nils
> >
> >
> >
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>