Comparing sets of data

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charles atlas
charles atlas 2011-11-22
I have a column of data that has a bunch of numbers indicating height of something. I have another column of data also indicating the height of something (they both have the same number of values). I want to say for every time a value in column X = 0, change the value that was in Y at the same location to 0.
I am not sure how to do this. Maybee an IF statement?

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Fangjun Jiang
Fangjun Jiang 2011-11-22
x=round(rand(10,1));
y=1:10;
index=x==0;
y(index)=0;

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