Nothing
## drop unanimous cols of a (rollcall) matrix
dropUnanimous <- function(obj, lop = 0) {
UseMethod("dropUnanimous")
}
dropUnanimous.rollcall <- function(obj, lop = 0) {
if (!inherits(obj, "rollcall")) {
stop("dropUnanimous.rollcall only defined for objects of class rollcall")
}
dropRollCall(obj,
dropList = list(lop = lop)
)
}
dropUnanimous.matrix <- function(obj, lop = 0) {
if (!is.matrix(obj)) {
stop("dropUnanimous.matrix only defined for objects of class matrix")
}
if (lop > 1 | lop < 0 | is.na(lop) | !is.numeric(lop) | length(lop) != 1) {
stop("bad value for lop, must be a single proportion")
}
goodObj <- !is.na(obj)
if (!all(as.vector(obj[goodObj]) %in% c(0, 1, NA))) {
stop("rollcall matrix contains codes other than 0, 1, and NA.")
}
m <- apply(obj, 2, minMargin)
drop <- m <= lop
out <- obj[, !drop]
out
}
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