selecting values from matrix

1 次查看(过去 30 天)
Hi everyones,
I explain my question with an example :
q2 is obtained from an equation
A=[r1 r2 r3;q1 q2 q3;k1 k2 k3];
I want to select proportional row values (r2 and k2).
what should I do?
Thanks.

采纳的回答

Star Strider
Star Strider 2015-11-23
Another way, especially if you don’t know where ‘r2’ is in the matrix, regardless of how large the matrix is:
A = [1:3; 4:6; 7:9];
r2 = 5;
[r,c] = find(A == r2);
other_values = setdiff([1:size(A,1)],r);
Result = A(other_values,c)
Result =
2
8
  4 个评论
Hamid
Hamid 2015-11-23
OK Thanks very much

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更多回答(1 个)

the cyclist
the cyclist 2015-11-23
Here's one way:
idx = A(2,:)==q2;
values = A([1 3],idx);
  3 个评论
the cyclist
the cyclist 2015-11-23
Maybe Star Strider's answer works for you? If not, then I would say you should start over with a new question, and fully specify the general problem.

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