how to select the highest values form each column and set the other values to zero.

2 次查看（过去 30 天）
jaah navi
jaah navi 2019-3-29
编辑： Andrei Bobrov 2019-3-29
If
A=[0.1290 0.2880 0.0193 0.2064 0.5245 0.5067 0.0255 0.2789;
0.2721 0.3500 0.0916 0.0913 0.5780 0.4616 0.3746 0.4651;
0.2011 0.2672 0.3051 0.1836 0.5149 0.3960 0.3730 0.3996;
0.0610 0.0374 0.0366 0.0453 0.0633 0.2699 0.2800 0.2522]
I want to generate the matrix from A such that it should contain the highest two values present in each column and the rest of values should be set to zero and it should diaplay in the following manner.
A=
[0 0.2880 0 0.2064 0.5245 0.5067 0 0;
0.2721 0.3500 0.0916 0 0.5780 0.4616 0.3746 0.4651;
0.2011 0 0.3051 0.1836 0 0 0.3730 0.3996;
0 0 0 0 0 0 0 0]
Could anyone please help me on this.
  2 个评论
Raj
Raj 2019-3-29
Looks pretty straight forward. However, can you first share what you have tried so far on this?
jaah navi
jaah navi 2019-3-29
when I tried with the command max(A) it gives only one maximum value from each column.
But i am unable to get the output what i want.that was the reason of posting my question

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Andrei Bobrov
Andrei Bobrov 2019-3-29
编辑：Andrei Bobrov 2019-3-29
[m,n] = size(A);
[~,ii] = sort(A);
A(bsxfun(@plus,ii(1:end-2,:),(0:n-1)*m)) = 0;
or
[m,n] = size(A);
[~,ii] = sort(A);
A(ii(1:end-2,:) + (0:n-1)*m) = 0;

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