Is there a problem with the function points_in_poly ? measure.points_in_poly

[Julien Derr]

Thanks to both of you for your quick reply!  and yes Johannes, you are
right!! it works the way you say!

sorry for bothering you for this mistake of mine! I am not very good at
convention, I thought my array was a (1,2) (1 line and two columns, so N=1)
bu I think I understand now!

thanks!


On Thu, Dec 4, 2014 at 7:19 PM, Johannes Schoenberger <jsch at demuc.de> wrote:

> The docs say `points` must be a (N, 2) array. You pass a (2, ) array.
>
> Make it: ``skimage.measure.points_in_poly(np.array([[0,0]]),cont2)``
>
> > On Dec 4, 2014, at 1:05 PM, Julien Derr <julien.derr at gmail.com> wrote:
> >
> > Hi everyone,
> >
> > I would like to use the function points_in_poly to test if the point x,y
> is in the contour cont2
> > x=0 y=0, but I have the problem with any value of x and y:
> >
> > skimage.measure.points_in_poly(np.array([x,y]),cont2)  where cont2 is a
> contour of type  array :
> > but I get the following error:  "IndexError: invalid index"
> >
> > it is a little obscure for me, is there a problem with this function, or
> is it me who don't know how to apply it ?
> >
> > thanks a lot!
> >
> > Julien
> >
> >
> >
> >
> > cont2        ndarray    7879x2: 15758 elems, type `float64`, 126064
> bytes (123 kb)
> >
> > In [12]: skimage.measure.points_in_poly(np.array([0,0]),cont2)
> >
> ---------------------------------------------------------------------------
> > IndexError                                Traceback (most recent call
> last)
> > /home/julien/Dropbox/density_seiche/<ipython-input-12-2271d0f2b0ba> in
> <module>()
> > ----> 1 skimage.measure.points_in_poly(np.array([0,0]),cont2)
> >
> >
> /usr/local/lib/python2.7/dist-packages/scikit_image-0.11dev-py2.7-linux-x86_64.egg/skimage/measure/_pnpoly.so
> in skimage.measure._pnpoly.points_in_poly (skimage/measure/_pnpoly.c:2397)()
> >
> > IndexError: invalid index
> >
> >
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