Where is my mistake on cumulative sum of 4 matrices?

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]

Please clarify:

Is ‘aa’ (4x101x4) or something else?

[Volkan Yangin]

4 line and each line has 101 elements. For ex.

1 2 3 4 ... 101
5 6 7 8 ... 105
9 10 11 12 ... 109
13 17 21 25 ... 113

[the cyclist]

Sorry, it is still not perfectly clear. It seems that you have one variable, named aa. Right?

What is the output of this command?

size(aa)

[Volkan Yangin]

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]

No worries.

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

Answer 1

[the cyclist]

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]

Thank you the cyclist. I will try this.

Answer 2

[Star Strider]

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

cum_sum = cumsum(aa,2);

[Volkan Yangin]

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

[Star Strider]

My pleasure.