MATLAB: Cumsum reset back to zero every 100 times

Question

I have a matrix R = [1×601] size. I want to use cumsum to get an accumulative value but reset cumsum back to zero each 100 positions.

Then I want to plot the result, so there should be 6 times where the plot goes back to zero on the y axis.

Is this possible? Please let me know if you don't understand what I'm trying to achieve, and thanks!! Have a good day, Chris

Answer 1

I interpreted "reset cumsum to zero" as restart cumsum from scratch.

 data = rand(1,601);
 dummy = zeros(100,ceil(size(data,2)./100));
 dummy(1:numel(data)) = data;
 dummy = cumsum(dummy,1);
 plot(data); hold on
 data = dummy(1:numel(data));
 plot(data);