Extracting intervals from an array to create a new array

Hi,

I'm trying extract a series of intervals from an array to create a new array, where it is the sum of these individual intervals.

For example I have a 100x1 array, would like to divide it in such that every 5 number is in a group. Then a new array should be created, which contains the sums of all these intervals (which should end up being a 20x1 array).

I've tried to solve it with a "for function", but can't really seem to get it working. Any help or hints would be highly appreciated :)

Best regards

Answer 1

[madhan ravi]

sum(reshape(array,[],5),2)

[Martin Hansen]

Thank you!