Hi,
I am trying to use optim to solve a heavy calibration problem. I supply
the parameters in vector form. But before entering my target
The call is simply:
optim(par = parameters, fn = SumLSQ, method = "Nelder-Mead")
the function SumLSQ is simply:
SumLSQ<-function(parameters, data = timeseries){
print("sumLSQ")
nbseries = dim(timeseries)[2]/3
SumLSQ = 0
for (i in (1:nbseries)){
SumLSQ = SumLSQ +
LSQ(parameters,timeseries[,((i-1)*3+1):(i*3)])
}
}
I actually never enter the objective function SumLSQ. I always receive
the error:
(list) object cannot be coerced to 'double'
And I really don't know where it comes from. II thought it was the
format of "par" argument but I think it is correct to supply a numerical
vector ...
Thnaks a lot for any help!
Stephane
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