Sort Matrix based on column of another matrix

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Christopher Ibeh
Christopher Ibeh 2019-8-5
评论： Alex Mcaulley 2019-8-5
I have matrices A and B
A=[1 1 4; 2 2 5; 3 3 6; 4 4 8; 5 5 9; 6 8 5; 7 9 4; 8 1 2; 9 3 4; 10 4 1];
B=[3;5;7;2;1;8;4;6;9];
I want to sort matrix A using the values in the column matrix B to have the C below:
C=[A=[3 3 6; 5 5 9; 7 9 4; 2 2 5; 1 1 4; 8 1 2; 4 4 8; 6 8 5; 9 3 4]
I have tried the code below, but it seems not to work
q=ismember(A(:,1), B(:,1), 'rows');
z=find(q);
C=A(z,1:3);

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回答（1 个）

Alex Mcaulley
Alex Mcaulley 2019-8-5
C = A(B,:)
  2 个评论
Christopher Ibeh
Christopher Ibeh 2019-8-5
Thanks but am getting 27 rows instead of 9 rows for C.
Alex Mcaulley
Alex Mcaulley 2019-8-5
Sure?
A = [1 1 4; 2 2 5; 3 3 6; 4 4 8; 5 5 9; 6 8 5; 7 9 4; 8 1 2; 9 3 4; 10 4 1];
B = [3;5;7;2;1;8;4;6;9];
C = A(B,:)
C =
3 3 6
5 5 9
7 9 4
2 2 5
1 1 4
8 1 2
4 4 8
6 8 5
9 3 4

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