which function can calculate standard deviation with weights?

2017 1 20
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更新时间：2017 1 23
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I know function "std" can get an array's standard deviation;
but now I want to calculate standard deviation with certain weights for each number of array; for example,
X=[1,2,3,4,5]; and weights=[0.1,0.3,0.1,0.3,0.1];
so is there the built-in function in Matlab?

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