Check if matrix contains valid elements

Question

I have this array

scale=np.array([-3,0,2,4,7,10,12])

And this matrix

matrix=np.array([[17, 10, 10],
       [10, 12, 12],
       [ 7,  7,  4],
       [-3, 11,  2]])

Now i want to know the indices of the rows in matrix which doesn't contain any of the elements in scale. The output should be:

array([0,3])

I've tried with np.where, np.all and np.any without solving the problem.

Do you have a simple solution to this?

Answer 1

You are rather looking for:

np.where(~np.in1d(matrix, scale).reshape(matrix.shape).all(axis=1))
#(array([0, 3], dtype=int64),)