Revision 3eb05b47e3c64708a402ce1abb3216dc2ace91e8 authored by Berend Hasselman on 07 August 2022, 13:10:02 UTC, committed by cran-robot on 07 August 2022, 13:10:02 UTC
1 parent 2d43468
trig.R
library("nleqslv")
# Trigonometric function
trig <- function(x) {
n <- length(x)
y <- cos(x)
s <- sum(y)
y <- n - s + c(1:n) * (1-y) - sin(x)
y
}
trigjac <- function(x) {
n <- length(x)
J <- matrix(numeric(n*n),n,n)
for (p in 1:n) {
J[,p] <- sin(x[p])
J[p,p] <- (p+1) * sin(x[p]) - cos(x[p])
}
J
}
do.print.xf <- FALSE
print.result <- function(z) {
if( do.print.xf ) {
print(z$x)
print(z$fvec)
}
print(z$message)
print(all(abs(z$fvec)<=1e-8))
}
n <- 10
xstart <- rep(1,n)/n
fstart <- trig(xstart)
znlm <- nleqslv(xstart, trig, global="dbldog", control=list(trace=0))
print.result(znlm)
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