 Hello everybody
 
I try to fit a neural network on my data by using package 'neuralnet' or 'nnet'. 
I did it several times but I got an unexpected answer, 
 
this is my code (num.obs=100): 
(
library('nnet')

y<-data.frame(data$CU) (y is cu concentration)
x<-data.frame(data$mrvbf,data$plcurvature,data$insol)
mod1<-nnet(x,y,size=3,linout=T)
 
)
when I write: mod1$fitted.values, it is same for all of 100 y.
e.g.
1  832.77
2  832.77
3  832.77
.
.
.
100 832.77
 
I don't know where is the problem?
Please help
 
Thanks alot
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