Description Usage Arguments Value Author(s) Examples
View source: R/corrected_cov_functions.R
Obtain confidence interval for corrected coverage estimate using Z-scores and mafs
1 2 3 4 5 6 7 8 9 10 11 12 | corrcov_CI(
z,
f,
N0,
N1,
Sigma,
thr,
W = 0.2,
nrep = 1000,
CI = 0.95,
pp0min = 0.001
)
|
z |
Marginal Z-scores |
f |
Minor allele frequencies |
N0 |
Number of controls |
N1 |
Number of cases |
Sigma |
SNP correlation matrix |
thr |
Minimum threshold for fine-mapping experiment |
W |
Prior for the standard deviation of the effect size parameter, beta (default 0.2) |
nrep |
The number of simulated posterior probability systems to consider for the corrected coverage estimate (nrep = 1000 default) |
CI |
The size of the confidence interval (as a decimal) |
pp0min |
Only average over SNPs with pp0 > pp0min |
CI for corrected coverage estimate
Anna Hutchinson
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | # this is a long running example
set.seed(1)
nsnps = 100
N0 = 5000
N1 = 5000
z_scores <- rnorm(nsnps, 0, 3) # simulate a vector of Z-scores
## generate example LD matrix
library(mvtnorm)
nsamples = 1000
simx <- function(nsnps, nsamples, S, maf=0.1) {
mu <- rep(0,nsnps)
rawvars <- rmvnorm(n=nsamples, mean=mu, sigma=S)
pvars <- pnorm(rawvars)
x <- qbinom(1-pvars, 1, maf)
}
S <- (1 - (abs(outer(1:nsnps,1:nsnps,`-`))/nsnps))^4
X <- simx(nsnps,nsamples,S)
LD <- cor2(X)
maf <- colMeans(X)
corrcov_CI(z = z_scores, f = maf, N0, N1, Sigma = LD, thr = 0.95)
|
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