Compare rows from different columns

Question

Scott Dean Seedell 2024-2-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2083208-compare-rows-from-different-columns

回答： Star Strider 2024-2-17

I'm sure this isn't difficult but my brain is struggling a little:

I want to compare two column vectors and see if any of the values in the 1st are larger than any of the corresponding values in the 2nd.

For instance, if row 8 is larger in the 2nd column than the 1st.

Or if row 6 is larger in the 2nd column than the 1st.

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Answer 1

Star Strider 2024-2-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2083208-compare-rows-from-different-columns#answer_1410713

在 MATLAB Online 中打开

One approach —

A = randi(50,10,2)
A = 10×2
    50     1
     2    25
    44    38
    48    14
    46    12
    42     9
     2    28
     4    13
    34    18
     2     2
Col_2_Larger = A(:,2) > A(:,1)
Col_2_Larger = 10×1 logical array
   0
   1
   0
   0
   0
   0
   1
   1
   0
   0
ColNr = find(Col_2_Larger);
fprintf('Col 2 larger in row %d\n', ColNr)
Col 2 larger in row 2
Col 2 larger in row 7
Col 2 larger in row 8