How to add another condition for the indexing of certain elements in an array.

Question

Abdul Rehman 2020-5-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/524401-how-to-add-another-condition-for-the-indexing-of-certain-elements-in-an-array

评论： KSSV 2020-5-11

I am using this code to find the index of elements having maximum value in each row of a matrix A

for ii=1:row % row is the number of rows in the matrix A
      [ii1,jj1] = find(M==max(M(ii,:)));
      [indices]=[indices;ii1,jj1];

Now, I want to find those elements that fullfill another condition i.e. they have minimum value in thier respective column. How can I achieve that.

I have just started learning Matlab and any guidline will be appreciated. Also, I do not need the code only guidline or a way to do this task. Thanks in advance.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

KSSV 2020-5-10

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/524401-how-to-add-another-condition-for-the-indexing-of-certain-elements-in-an-array#answer_431563

在 MATLAB Online 中打开

Read about max and min. You can specify the dimension i.e you want max, min along row or column. If A is your matrix.

You can max element in every column using

[val,idx] =max(A) ; 
[val,idx] = max(A,[],1) ; 

The above steps are same.

If you want to get max element in every row use:

[val,idx] = max(A,[],2) ;

Same is the case with min.

4 个评论
显示 2更早的评论隐藏 2更早的评论

Abdul Rehman 2020-5-11

But max and min will only give us the index and vlaue of the first maximum and minimum element in an array. I need to find all values of maximum or minimum elements i.e. if a vlaue repeats in a row i wanted both its indeces.

Thanks for your time.