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** Desc: Wrapper for multproc to calculate minimum q-values from two-stage FDR correction
** Author: Justin Abraham
** Input: vector of p-values
** Output: vector of minimum q-values
** Options: q() is the name of the output vector, step() is size of the decrement, label() attaches names to the output vector
capture program drop minq
program define minq, eclass
syntax anything(name = p), [q(string)] [step(real 0)] [label(string)] [plabel]
if "`step'" == "" loc step = 0.01
if "`q'" == "" loc q = "Q"
preserve
clear
svmat `p'
loc j = 1
forval i = 1(-`step')`step' {
di as text "Correction with q = `i'"
qui multproc, pvalue(`p') method(krieger) puncor(`i') reject(reject`j')
qui count if reject`j' == 0
loc ++j
if (`r(N)' == _N) continue, break
}
egen `q' = rowtotal(reject*)
replace `q' = 1 - (`q' * `step')
replace `q' = . if mi(`p')
if "`label'" == "" mkmat `q', mat(`q')
else {
loc k = 1
gen varn = ""
foreach name in `label' {
replace varn = "`name'" if _n == `k'
loc ++k
}
mkmat `q', mat(`q') rownames(varn)
if "`plabel'" != "" mkmat `p', mat(`p') rownames(varn)
}
restore
end