Mapping between two arrays wrt one column

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SANGHAMITRA MISHRA
SANGHAMITRA MISHRA 2017-12-25
回答： Star Strider 2017-12-25
I have two matrices: A=[1 10; 2 20; 3 30] and B=[3 1 2]'
I want this to be my final answer A=[3 30;1 10;2 20] How do I do this?

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Star Strider
Star Strider 2017-12-25
Use ‘B’ to define the rows of ‘A’:
A=[1 10; 2 20; 3 30];
B=[3 1 2]';
Anew = A(B,:)
Anew =
3 30
1 10
2 20

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