[Scilab-users] issue with "sum"
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 ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] issue with "sum"
paul, remember the transpose is *conjugate transpose*, use .' instead. S. Le 27/09/2016 à 15:04, paul.carr...@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 ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
Re: [Scilab-users] issue with "sum"
"remember" heuhhh ... :-) Thanks Stephane - Mail original - De: "Stéphane Mottelet" À: "Users mailing list for Scilab" Envoyé: Mardi 27 Septembre 2016 15:09:36 Objet: Re: [Scilab-users] issue with "sum" paul, remember the transpose is *conjugate transpose*, use .' instead. S. Le 27/09/2016 à 15:04, paul.carr...@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 > > ___ > users mailing list > users@lists.scilab.org > http://lists.scilab.org/mailman/listinfo/users ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users ___ users mailing list users@lists.scilab.org http://lists.scilab.org/mailman/listinfo/users
