explain if i <= (len-sm) in matlab

In Matlab, len and sm are variables representing the length of some array A and some value to be checked B respectively. i is an arbitrary counter variable used in some loop iterating through A from index 1 to len-sm.

The condition i<=(len-sm) is checking whether the current value of i being looped through is less than or equal to the length of the remaining portion of the array A yet to be processed after accounting for the offset sm.

To put it simply, the loop only proceeds for the given condition and it won't process any items after the remaining length of the array.