清空筛选条件
清空筛选条件

Matrix of ratios w.r.t. row or colum header

1 次查看（过去 30 天）
Muhammad Shafique
I have very large symmetric matrices in which first row and column are headers that represent the size of different groups and the vertices represent the number of common members between each pair of groups. For example, the original 5*5 matrix is as follows:
A=[100 80 90 50 70; 80 80 30 40 10; 90 30 90 10 50; 50 40 10 50 30; 70 10 50 30 70]
I need to calculate a ratio matrix so that each element of the original matrix is divided by its respective row or column header, whichever is smaller of the two. That is, the resulting ratio matrix will be obtained as following:
Ar=[100 80 90 50 70; 80 80/80 30/80 40/50 10/70; 90 30/80 90/90 10/50 50/70; 50 40/50 10/50 50/50 30/50; 70 10/70 50/70 30/50 70/70]
Could anyone help how can it be done? I shall be grateful.
Best regards, shafique

请先登录，再回答此问题。

回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-3-9
编辑：Azzi Abdelmalek 2013-3-9
n=size(A,2)
out=A./[ones(1,n);repmat([1 A(1,2:end)],n-1,1)]

类别

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by