https://github.com/cran/pracma
Tip revision: c7b20449f057481c4a6908b43e23cbe9884eb57b authored by Hans W. Borchers on 14 January 2014, 00:00:00 UTC
version 1.6.1
version 1.6.1
Tip revision: c7b2044
polyadd.R
##
## p ol y a d d .R Polynomial Addition
##
polyadd <- function(p, q){
if ( (!is.vector(p, mode="numeric") && !is.vector(p, mode="complex")) ||
(!is.vector(q, mode="numeric") && !is.vector(q, mode="complex")) )
stop("Arguments 'p' and 'q' must be real or complex vectors.")
lp <- length(p)
lq <- length(q)
if (lp >= lq) {
r <- p + c(numeric(lp-lq), q)
} else {
r <- q + c(numeric(lq-lp), p)
}
lr <- length(r)
while (r[1] == 0 && lr > 1) {
r <- r[2:lr]
lr <- lr - 1
}
return(r)
}