How to filter numpy array by list of indices?

Question

I have a numpy array, filtered__rows, comprised of LAS data [x, y, z, intensity, classification]. I have created a cKDTree of points

Answer 1

It looks like you just need a basic integer array indexing:

filter_indices = [1,3,5]
np.array([11,13,155,22,0xff,32,56,88])[filter_indices]