Cannot remove a column from Array python using numpy

Question

Given the following array:

import numpy as np
G = np.array([[2.7, 0, -0.2, 0, -0.5, -1],
                  [0, 9, 0, 0, -10, 1],
                  [-0.2, 0, 4.2, -4, 0, 0],
                  [0, 0, -4, 4, 0, 0],
                  [-1.5, -10, 0, 10.5, 0],
                  [-3, 1, 0, 0, 0, 1]])

If i remove a row from the array using G = np.delete(G, 3, axis=0), it removes row at position 3 properly.

But i cannot remove a column like this: G = np.delete(G, 3, axis=1)

I get following error:

numpy.AxisError: axis 1 is out of bounds for array of dimension 1.

Can someone please point me to the right way? what am i doing wrong ?

Your array is broken. The row lengths don't match; [-0.5, -10, 0, 10.5, 0] only has 5 elements. — user2357112
– user2357112, Commented Feb 20, 2019 at 18:06
Did you look at G after creating it? Does it look like a normal 2d numeric array? — hpaulj
– hpaulj, Commented Feb 20, 2019 at 18:09

Polkaguy6000 · Accepted Answer · 2019-02-20 18:16:53Z

1

Your array has shape of (6,) because your array lengths don't match. Check the second to last array. If you only have 5 observations, add np.nan to the end of row 5 (like this [-1.5, -10, 0, 10.5, 0,np.nan],and you'll fix the problem.

answered Feb 20, 2019 at 18:16

Polkaguy6000

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