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ftestnls
2013 Jan 02
1
Need help with self-defined function to perform nonlinear regression and get prediction interval
...ed this
problem with all the other self-defined functions, only this one, so I doubt
it is caused by something in the nls2 package.
I attached my main program and the function as follows. Thank you all in
advance.
# Main program
rm(list=ls())
x <- c(0,1,3,4,5,2,10,4,6,8,7)
y <- seq(0,10,1)
ftestnls(x,y) # Call the function
# function 'ftestnls(v1,v2)'
# v1 <- x
# v2 <- y
ftestnls <- function(v1,v2){
datalist <- list(v1=v1,v2=v2)
startvalues <- list(a0=v1[1],a1=0,a2=0)
# Perform nonlinear regression
require(nls2)
nlsmodel <- nls(v1~a0 + a1*v2 + a2
*sin(...