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replace one matrix with the positon indicated in another matrix

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tanveer haq
tanveer haq 2018-11-19
评论： tanveer haq 2018-11-19
I have two large matrices, for instance
A = [1 3 3 4];
B = [1 2 3 4 ; 5 6 7 8 ; 9 10 11 12 ; 13 14 15 16 ] ;
matrix A represents the postion of numbers of matrix B.
Now how to write B as:
B = [1 3 3 4 ; 5 7 7 8 ; 9 11 11 12; 13 15 15 16];

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采纳的回答

Bruno Luong
Bruno Luong 2018-11-19
B(:,A)

更多回答（1 个）

KSSV
KSSV 2018-11-19
A = [1 3 3 4];
B = [1 2 3 4 ; 5 6 7 8 ; 9 10 11 12 ; 13 14 15 16 ] ;
B(:,2) = B(:,2)+1 ;

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