[Scilab-users] issue with "sum"

[Stéphane Mottelet]

paul,

remember the transpose is *conjugate transpose*, use .' instead.

S.

Le 27/09/2016 à 15:04, paul.carrico at free.fr a écrit :
> Hi again
>
> In the following example, the sum lead to an opposite sign for the complex part … Am I doing something wrong ?
>
> thanks for any highlight
>
> Paul
>
> ################################################
> mode(0)
>
> A = [
> - 3.
> 6.123D-17
> 3.
> - 3.
> - 3.062D-17 - 5.303D-17*%i
> - 1.5 + 2.5980762*%i
> - 3.
> - 3.062D-17 + 5.303D-17*%i
>   - 1.5 - 2.5980762*%i]
>
> mat = matrix(A,3,3)
>
> sum1 = sum(mat,'r')' // reference matrix
>
> sum_c1 = sum(mat(:,1)) // sum of the 1rst column of sum1 matrix
> sum_c2 = sum(mat(:,2)) // 2nd column of sum1 matrix
> sum_c3 = sum(mat(:,3)) // 3rd column of sum1 matrix
>
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