Select cells randomly from NumPy array - without replacement

Question

I\'m writing some modelling routines in NumPy that need to select cells randomly from a NumPy array and do some processing on them. All cells must be selected without replacemen

Answer 1

How about using numpy.random.shuffle or numpy.random.permutation if you still need the original array?

If you need to change the array in-place than you can create an index array like this:

your_array = 
index_array = numpy.arange(your_array.size)
numpy.random.shuffle(index_array)

print your_array[index_array[:10]]