Finding the maximum value in a specific row of a matrix

Question

Meghan Brownlee 2015-11-18

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https://ww2.mathworks.cn/matlabcentral/answers/255932-finding-the-maximum-value-in-a-specific-row-of-a-matrix

回答： gowtham balu 2021-11-25

I have this matrix:

M = [3 6 1 -2; 3 0 -2 -4; 8 -3 5 4; -2 -3 -2 5];

And I need to find the maximum value in row 4, and next I need to know the maximum value in columns 2 and 3. I know it seems simple but I can't remember and the help command is not being very helpful. Thanks!

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Muhammad Affan Arif 2021-3-2

Although it's too late, might be helpful for others.

row_max = max(M'); %finds the maximum value in each row by taking transpose of matrix M

my_max_val = col_max(1,4) % gives the maximum value in row 4.

%For the maximum value in columns 2 and 3:

col_max = max(M);

col_max1 = col_max(1,2)

col_max2 = col_max(1,3)

KALYAN ACHARJYA 2021-3-2

编辑：KALYAN ACHARJYA 2021-3-2

:) 2015 --2021

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Answer 1

KSSV 2021-3-2

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/255932-finding-the-maximum-value-in-a-specific-row-of-a-matrix#answer_637031

在 MATLAB Online 中打开

M = [3 6 1 -2; 3 0 -2 -4; 8 -3 5 4; -2 -3 -2 5];
[val1,idx1] = max(M(4,:))   % maximum in the row 4 
[val2,idx2] = max(M(:,3))   % maximum in the column 3 