Is there a problem with the function points_in_poly ? measure.points_in_poly
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/<ipythoninput122271d0f2b0ba> in <module>() > 1 skimage.measure.points_in_poly(np.array([0,0]),cont2)
/usr/local/lib/python2.7/distpackages/scikit_image0.11devpy2.7linuxx86_64.egg/skimage/measure/_pnpoly.so in skimage.measure._pnpoly.points_in_poly (skimage/measure/_pnpoly.c:2397)()
IndexError: invalid index
Le 04/12/2014 13:05, Julien Derr a écrit :
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 ?
Hi Julien,
Could you provide a minimal example with data to reproduce the error?
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@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/<ipythoninput122271d0f2b0ba> in <module>() > 1 skimage.measure.points_in_poly(np.array([0,0]),cont2)
/usr/local/lib/python2.7/distpackages/scikit_image0.11devpy2.7linuxx86_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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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@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@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/<ipythoninput122271d0f2b0ba> in
<module>()
> 1 skimage.measure.points_in_poly(np.array([0,0]),cont2)
/usr/local/lib/python2.7/distpackages/scikit_image0.11devpy2.7linuxx86_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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participants (3)

François Boulogne

Johannes Schoenberger

Julien Derr