Nothing
"are.parwak.valid" <-
function(para,nowarn=FALSE) {
if(! is.wak(para)) return(FALSE)
if(any(is.na(para$para))) return(FALSE)
A <- para$para[2]
B <- para$para[3]
C <- para$para[4]
D <- para$para[5]
op <- options()
GO <- TRUE
if(nowarn == TRUE) options(warn=-1)
if(C < 0) {
warning("Parameters are invalid, gamma < 0")
GO <- FALSE
}
if(A+C < 0) {
warning("Parameters are invalid, alpha + gamma < 0")
GO <- FALSE
}
if(B+D <= 0 & any(c(B,C,D) != 0)) {
warning("Parameters are invalid, either beta+delta <= 0 or any beta, gamma, delta != 0")
GO <- FALSE
}
if(A == 0 & B != 0) {
warning("Parameters are invalid, alpha == 0 and beta != 0")
GO <- FALSE
}
if(C == 0 & D != 0) {
warning("Parameters are invalid, gamma == 0 and delta != 0")
GO <- FALSE
}
options(op)
if(GO) return(TRUE)
return(FALSE)
}
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