Question

Lets say I have an array

Y = [1, 2, 3, 4, 5, 6]

I want to make a new array that replaces every other number with 0, so it creates

y = [1, 0, 3, 0, 5, 0]

How would I go about approaching this and writing code for this in a efficient way?

Answer 1

This should do that:

Y(2:2:end) = 0;

With this line you basically say each element starting from the seconds up to the last, in steps of two, should be zero. This can be done for larger steps too:, Y(N:N:end) = 0 makes every Nth element equal to 0.