清空筛选条件
清空筛选条件

When given a matrix with x columns, how do you multiply the first column by 1, the second column by 2, etc?

2 次查看（过去 30 天）
S
S 2014-10-4
编辑： the cyclist 2014-10-4
For example, if the matrix has 4 columns. I want to multiply the first column by 1, the second column by 2, the third column by 3 and the fourth column by 4. How can I create a function for this?

请先登录，再回答此问题。

采纳的回答

the cyclist
the cyclist 2014-10-4
编辑：the cyclist 2014-10-4
Use bsxfun(). For example,
A = rand(3,4);
B = bsxfun(@times,A,1:4)
More generally,
B = bsxfun(@times,A,1:size(A,2))

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Operators and Elementary Operations 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