Find minimum among matrices with different sizes

Question

Gaetano Pavone 2023-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/1933240-find-minimum-among-matrices-with-different-sizes

编辑： Dyuman Joshi 2023-3-22

Hello,

I have two matrices: A=[2 8 4; 7 3 9] and B=[1 3 5]. I want to compare A and B for finding the minimum values such that the first row of A will be compared with the first row of B. Moreover, the rows of A exceeding the size of B will be not compared.

Thus, the comparison should generate a matrix C with the same sizes of A, that is: C=[1 3 4;7 3 9].

Thanks,

Best

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Answer 1

Dyuman Joshi 2023-3-22

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在 MATLAB Online 中打开

Your statements contradict each other, but I guess this is what you want to obtain

A=[2 8 4; 7 3 9];
B=[1 3 5];
C=min(A,B)
C = 2×3
     1     3     4
     1     3     5

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Gaetano Pavone 2023-3-22

I've edited my question

Dyuman Joshi 2023-3-22

编辑：Dyuman Joshi 2023-3-22

在 MATLAB Online 中打开

A=[2 8 4; 7 3 9];
B=[1 3 5];
%method 1
%comparing and then adding the remaining rows of A
C1=[min(A(1,:),B);A(2,:)]
C1 = 2×3
     1     3     4
     7     3     9
%method 2
%assinging and then comparing
C2=A;
C2(1,:)=min(C2(1,:),B)
C2 = 2×3
     1     3     4
     7     3     9
%method 3
%modifying B and then comparing
B1=[B;Inf*B];
C3=min(A,B1)
C3 = 2×3
     1     3     4
     7     3     9