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Справка Scilab >> Matlab to Scilab Conversion Tips > Matlab-Scilab equivalents > S > sum (Matlab function)

# sum (Matlab function)

Sum of array elements

### Matlab/Scilab equivalent

 Matlab Scilab `sum` `sum`

### Particular cases

M=sum(A)

Scilab sum(A) returns the sum of all components of A. So, if A is a vector, then Scilab and Matlab work in the same way. If A is a matrix, Scilab sum(A) gives the sum of all elements of A but Matlab returns the sum of each column. Finally, if A is a multidimensional array, Matlab works on the first non-singleton dimension of A what Scilab does not. So, to be sure to find a Scilab equivalent for Matlab call to sum it is better to precise dimension on which to work.

M=sum(A,dim)

In Scilab dim=1 is equivalent to dim="r" and dim=2 is equivalent dim="c". In Matlab, dim can be greater then the number of dimension of A (in this case, M=A), in Scilab you will get an error message.

### Examples

 Matlab Scilab ```A = [1,2,3;4,5,6] M = sum(A) M = [5,7,9] M = sum(A,1) M = [5,7,9]``` ```A = [1,2,3;4,5,6] M = sum(A) M = 21 M = sum(A,"r") M = [5,7,9]```
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