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how to get row from matrix follow a list of rule

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R G
R G 2017-8-9
回答： KL 2017-8-9
I have a list of number, and i want to extract particular row from a list of row:
example:
% A = [1 2;
3 4;
5 6]
B = [1;
3]
so C is the extracted matrix from A by row number in B
% C = [1 2;
5 6]

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KL
KL 2017-8-9
C = A(B,:)

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