Last data update: 2014.03.03
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R: Estimate trait variance, internal function
Estimate trait variance, internal function
Description
Estimate trait standard deviation given vectors of
variance of coefficients, MAF and sample size
Usage
sdY.est(vbeta, maf, n)
Arguments
vbeta |
vector of variance of coefficients
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maf |
vector of MAF (same length as vbeta)
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n |
sample size
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Details
Estimate is based on var(beta-hat) = var(Y) / (n *
var(X)) var(X) = 2*maf*(1-maf) so we can estimate var(Y)
by regressing n*var(X) against 1/var(beta)
Value
estimated standard deviation of Y
Author(s)
Chris Wallace
Results
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