find value from matriks

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Internazionale
Internazionale 2013-2-25
i have matriks A with size (64,4), so the variables is part of A = [A1 A2 A3 A4] i want to process them, to find a value ei=A3-(0.5*A1) and fi = A4-(0.5*A2). so the output is 64 value of ei and 64 value of fi.

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回答（2 个）

the cyclist
the cyclist 2013-2-25
编辑：the cyclist 2013-2-25
ei = A(:,3) - 0.5*A(:,1);
fi = A(:,4) - 0.5*A(:,2);
Thorsten
Thorsten 2013-2-25
A = rand(64, 4);
ei = A(:,3) - 0.5*A(:, 1);
fi = A(:,4) - 0.5*A(:, 2);

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