Matlab多重索引 [英] Matlab multiple indexing

问题描述

我有一个像这样的矩阵：

I have a matrix like this one:

a= [ 61 65 63 ; ...
     21 21 24 ; ...
     34 2 51 ]
b= [ -1 0 8; ...
      -2 0 6; ...
      -4 0 2]
c=cat(3,a,b)

我想要做的是通过c上的第一个维度的行找到最高值，然后根据这些值来获取行和列的值，但是在c的第三个维度中。

What I want to do is to find by rows of the first dimension on c the highest value, and then based on these values to get the values at the row and column but in the third dimension of c.

在我的例子中，我正在尝试以下方法：

In my example, I am trying the following:

 [maxV,colIndx] =max(c,[],2)

 m=maxV(:,:,1)
 f=c(:,colIndx(:,1,1),2)

向量m返回我答案的一半，即

The vector m return half of my answer, ie

m =

    65
    24
    51

现在，我希望f类似于

f =

    0
    6
    2

但是，我的代码没有回报我想要的。非常感谢任何帮助！

However, my code doesn't return what I want. Any help is much appreciated!

推荐答案

尝试通过 sub2ind使用线性索引 function：

Try using linear indexing via the sub2ind function:

linIndx = sub2ind(size(c), (1:(size(c,1)))', colIndx(:,:,1), ones(size(c,1),1)*2);
f = c(linIndx)

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