find max value in a matrix

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Ace_ventura
Ace_ventura 2015-2-22
评论： Star Strider 2015-2-22
I have a=[ 1 2 3; 7 8 9; 4 5 6; 2 1 3]. I want to find max value in the matrix 'a' but i don't want it to consider second row. So I should get 6 as the answer. How to do it?

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回答（1 个）

Star Strider
Star Strider 2015-2-22
This works:
a=[ 1 2 3; 7 8 9; 4 5 6; 2 1 3];
a_134 = a([1 3 4],:);
max_a134 = max(a_134(:));
  2 个评论
Ace_ventura
Ace_ventura 2015-2-22
Thanks Man. But is there a way in which i don't have to define a_134 . I am looking for the max value without defining any sub matrix
Star Strider
Star Strider 2015-2-22
In that instance, just nest two max calls:
max_a134 = max(max(a([1 3 4],:)))

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