I need to make nonlinear regression with the posterior script, but how is the
problem? I have error in library (nls), package 'nls' has been merged into
'stats'.
I need help?
What other forms I have to make nonlinear regression? and how I find to
calculate statistics y residuals, scatterplot.
thanks
SCRIPT
ros<-read.table("Dataset.csv",header=T,sep=",")
ros
attach(ros)
# preliminaries
options(width=44)
options(digits=3)
## Nonlinear Regression
par(mfrow=c(1,2))
attach(ros)
plot(U1.7km, R, main="(a)")
library(nls)
mod1<-nls(R ~
beta1*(U1.7km^beta2)+(Hm^beta3)),start=list(beta1=2.031,beta2=0.800,beta3=-0.255),
trace = TRUE)
summary(mod1)
coef(mod1)
coef(summary(mod1))
lines(R, fitted.values(mod1), lwd=2)
plot(R, residuals(mod1), type="b", main="(b)")
abline(h=0, lty=2)
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