how can i do that for all columns?

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Ach 2018-3-5

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编辑： Stephen23 2018-3-13

hi , i have a matrix (length(a),length(b)) and i want to write a function that calculates the sum of all a in a column. how can i do that for all columns?

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Answer 1

Suraj Mankulangara 2018-3-13

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Hi Ach

The "sum" function in MATLAB returns the total of all elements in a column (or row) of a matrix. For more information on how to use the sum function, you can refer to the link below:

https://in.mathworks.com/help/matlab/ref/sum.html

By default, the "sum" function computes column-wise total of elements in a matrix, so in your case,

sum(matrix)

should get you the result that you want.