
Hi,

I would like to know if you could help me... I need to restrict a parameter
in a problem of optimization but I don't know how to do it.

function(s){
c<-s[1]
a1<-s[2]
a2<-s[2]

return(-sum())
}

optim(...)

In fact I need to know how to specify 0<=a1<=1. I've tried but without
success

Thank you 

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