matlab code question

I am new to matlab and need some help. Can somebody explain what the following code does? Isn't that going into an infinite loop?

Y(ii:ii+window-1).*hanw

Answer 1

[Andrew Newell]

I don't know what the variables are, but you're probably worried about the indexing. Let's take an example:

ii = 3;
window = 4;
ii:ii+window-1

ans =

     3     4     5     6

It is a vector of consecutive integers, and Y(ii:ii+window-1) selects elements 3 to 6 of Y.

EDIT: See colon operator and Matrix Indexing in MATLAB.

Answer 2

[Matt Tearle]

The colon in MATLAB is the range operator so ii:ii+window-1 gives the values ii, ii+1, ii+2, etc, for a total of window points. Hence this line of code extracts the window values of Y starting at the ii-th point, then multiplies them by the vector hanw.

[Jan]

... then multiplies them *elementwise* by the vector hanw.