want to multiply two matrices each time in a particular position according to randperm matrix position

1 次查看（过去 30 天）
learningmat
learningmat 2013-9-3
hi all, i want to multiply 2 50 x 50 matrix, according to the position of reandperm matrix. i.e first i ll generate randperm matrix, it consists of 50 elements. Now according to the elements in randperm ie if the first element is 20,i want to multiply 20 th position element in the both matrix. like this i have to multiply all 50 positions and have to sum it. how to do it in matlab. If anyone know, Pls suggest me too.

请先登录，再回答此问题。

回答（2 个）

Matt J
Matt J 2013-9-3
编辑：Matt J 2013-9-3
rp=randperm(50);
result = dot( Matrix1(rp), Matrix2(rp));
Matt J
Matt J 2013-9-3
编辑：Matt J 2013-9-3
rp=randperm(50);
result = Matrix1(rp,:)*Matrix2(:,rp);
or
result = Matrix1(:,rp)*Matrix2(rp,:);

类别

在 Help Center 和 File Exchange 中查找有关 Operating on Diagonal Matrices 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by