# Where is my mistake on cumulative sum of 4 matrices?

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Volkan Yangin on 19 Mar 2017
Commented: Star Strider on 19 Mar 2017
Hi everbody, I have 4 matrices and to find cumulative sum of them, i use this code:
%aa includes 4 matrices (4 line, 101 columns for each line)
for i=1:1:4;
cum_sum=cumsum(aa(i,:))
end
MATLAB gives me one result with this code. How can i generate 4 result with using this code?
Thanks
Star Strider on 19 Mar 2017
No worries.
The code for 4 matrices is much different that for 1 matrix with 4 rows.

the cyclist on 19 Mar 2017
My best guess, with the current information as I write this, is that you just need either
cum_sum = cumsum(aa)
or
cum_sum = cumsum(aa,2)
without using the for loop at all.
Volkan Yangin on 19 Mar 2017
Thank you the cyclist. I will try this.

Star Strider on 19 Mar 2017
If you have one matrix with 4 rows and 101 columns, this works:
cum_sum = cumsum(aa,2);
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Star Strider on 19 Mar 2017
My pleasure.