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Conditional equation X1=X(y==1) ?

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Safouane Chergui
Safouane Chergui 2017-7-13
回答： Fangjun Jiang 2017-7-13
I have a matrix X and a column vector y. When I write something like X1=X(y==1), I only get the numbers from the first column of X. How to get numbers from all others columns when y==1 ?

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Fangjun Jiang
Fangjun Jiang 2017-7-13
X1=X(y==1,:)

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