Nothing
check.counts <- function(n00, n01, n10, n11){
idx.double.zero <- which(n00 + n10 == 0 | n01 + n11 == 0)
if(length(idx.double.zero) > 0){
if(length(n00) - length(idx.double.zero) >= 5){
n00 <- n00[-idx.double.zero]
n01 <- n01[-idx.double.zero]
n10 <- n10[-idx.double.zero]
n11 <- n11[-idx.double.zero]
}else{
# avoid removing too many double-zero studies
n00[idx.double.zero] <- n00[idx.double.zero] + 0.01
n01[idx.double.zero] <- n01[idx.double.zero] + 0.01
n10[idx.double.zero] <- n10[idx.double.zero] + 0.01
n11[idx.double.zero] <- n11[idx.double.zero] + 0.01
}
}
idx.zero <- which(n00 == 0 | n01 == 0 | n10 == 0 | n11 == 0)
if(length(idx.zero) > 0){
n00[idx.zero] <- n00[idx.zero] + 0.5
n01[idx.zero] <- n01[idx.zero] + 0.5
n10[idx.zero] <- n10[idx.zero] + 0.5
n11[idx.zero] <- n11[idx.zero] + 0.5
}
out <- list(n00 = n00, n01 = n01, n10 = n10, n11 = n11)
return(out)
}
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