Nothing
glueCOP <- function(u,v, para=NULL, ...) {
if(length(para$cop1) == 0) {
warning("require Copula1 cop1 to be declared")
return(NULL)
}
if(length(para$cop2) == 0) {
warning("require Copula2 cop2 to be declared")
return(NULL)
}
if(length(para$para1) == 0) {
warning("require Copula1 parameters para1 to be declared")
return(NULL)
}
if(length(para$para2) == 0) {
warning("require Copula2 parameters para2 to be declared")
return(NULL)
}
if(is.na(para$glue)) {
warning("glue needed 0 <= glue <= 1")
return(NULL)
}
# Operationally the following tests are needed although, they are
# again used inside the COP() call. The compositing functions don't
# use this tests, but they are here because of the why that
# u, glue, and v can come in combinations of vector, as in rhoCOP().
if(length(u) > 1 & length(v) > 1 & length(u) != length(v)) {
warning("length u = ", length(u), " and length v = ", length(v))
warning("longer object length is not a multiple of shorter object length, no recycling")
return(NA)
}
if(length(u) == 1) {
u <- rep(u, length(v))
} else if (length(v) == 1) {
v <- rep(v, length(u))
}
glue <- para$glue
cop <- sapply(1:length(u), function(i) {
if(u[i] <= glue) { glue*COP( u[i]/glue, v[i],
cop=para$cop1, para=para$para1, ...)
} else { (1-glue)*COP((u[i]-glue)/(1-glue), v[i],
cop=para$cop2, para=para$para2, ...) +
glue*v[i]
} })
return(cop)
}
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