For loops question Help

2013 2 26
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Can someone please explain the steps to this problem for me?
What is the variable y as the result of the given Matlab code fragment?
index = 1;
x = [3 -1 2 4 6];
test = [2 5 1 3];
for var = test
y(index) = x(var);
index = index+1; end y = -1 6 3 2

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Matt J
Matt J 2013-2-26
编辑：Matt J 2013-2-26

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y is just a re-ordering of the elements of x in the order given by "test". You could have done this in one line as follows
>> y=x(test)
y =
-1 6 3 2

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