TypeError: 'float' object is not subscriptable in matrix

Question

I have this error:

"TypeError: 'float' object is not subscriptable"

This is the part of the code that displays the error:

nd_coord = random.uniform(npoints, 2)         
nd_coord[:,0] = nd_coord[:,0] * ((xmax - xmin) + xmin)   
nd_coord[:,1] = nd_coord[:,1] * ((ymax - ymin) + ymin)  
print (nd_coord)

Have you printed nd_coord, or checked it's type and/or shape? Clearly it isn't the 2d array that you expect. — hpaulj
– hpaulj, Commented May 9, 2015 at 2:53

xnx · Accepted Answer · 2015-05-09 01:35:37Z

1

I take it you've imported NumPy as from numpy import * and so random.uniform is the NumPy method. Its call signature is:

numpy.random.uniform(low=0.0, high=1.0, size=None)

So the way you're using it, it returns a single number (which can't be indexed). Perhaps you want:

nd_coord = np.random.uniform(size=(npoints,2))

To pick npoints pairs of random numbers on [0,1).

answered May 9, 2015 at 1:35

xnx

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