Where is my mistake on cumulative sum of 4 matrices?

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Volkan Yangin 2017-3-19

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评论： Star Strider 2017-3-19

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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

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Volkan Yangin 2017-3-19

编辑：Volkan Yangin 2017-3-19

Yes. Aa is a single variable. I plan to find cumulative sum of each line of aa.

Writing English is sometimes hard of me. :) Sorry for this.

Star Strider 2017-3-19

No worries.

The code for 4 matrices is much different that for 1 matrix with 4 rows.

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the cyclist 2017-3-19

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My best guess, with the current information as I write this, is that you just need either

cum_sum = cumsum(aa)

cum_sum = cumsum(aa,2)

without using the for loop at all.

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Volkan Yangin 2017-3-19

Thank you the cyclist. I will try this.

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Star Strider 2017-3-19

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If you have one matrix with 4 rows and 101 columns, this works:

cum_sum = cumsum(aa,2);

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Volkan Yangin 2017-3-19

Thanks Star Strider. I have just saved the code you sent.

Star Strider 2017-3-19

My pleasure.

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