display corresponding column matrix

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barath manoharan 2023-6-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1986584-display-corresponding-column-matrix

编辑： Stephen23 2023-6-22

采纳的回答： KALYAN ACHARJYA

Suppose I have 3 column matrices or 4*3 matrix stored in A such that

A = [1 3 5 ; 2 4 5 ; 5 4 7 ; 2 8 10]

and i have another row matrix with 3 columns(no. of columns same as A) stored in B such that

B = [29 87 15]

Now i want to display the least value in B and corresponding column vector in A.

Expected Output:

since from the above 15 is least in B set , i will display 15 along with corresponding column in A(15 is in 3rd column so we take 3rd column of A) such that

C = 15 (least value in B)

D = [5 ; 5 ; 7 ; 10] (corresponding 3rd column of least value)

I need a generalised code suppose if i have A = (15*150 matrix) and B = (1*150 matrix) then i need to display the least values in B and as well as display the corresponding column(same column where least value present in B) in A. I hope this explanation helps, thank you in advance

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采纳的回答

KALYAN ACHARJYA 2023-6-22

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1986584-display-corresponding-column-matrix#answer_1260509

编辑：KALYAN ACHARJYA 2023-6-22

在 MATLAB Online 中打开

A = [1 3 5 ; 2 4 5 ; 5 4 7 ; 2 8 10]
A = 4×3
     1     3     5
     2     4     5
     5     4     7
     2     8    10
B = [29 87 15]
B = 1×3
    29    87    15
idx=find(min(B)==B)
idx = 3
data=A(:,idx)
data = 4×1
     5
     5
     7
    10

It can be condensed into a single line as well. You can now proceed with the remaining parts on your end too.

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Stephen23 2023-6-22

编辑：Stephen23 2023-6-22

在 MATLAB Online 中打开

Regarding https://www.mathworks.com/matlabcentral/answers/1986584-display-corresponding-column-matrix#comment_2791224 even for multiple minimums, no FIND is required, logical indexing is simpler and more efficient:

A = [1,3,5; 2,4,5; 5,4,7; 2,8,10];
B = [29 15 15]; % here two minimum numbers 
idx = B==min(B);
out = A(:,idx)
out = 4×2
     3     5
     4     5
     4     7
     8    10