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gdval
2013 Apr 23
2
SSbiexp
Hello all!
I have a problem to use a biexponential regression model:
I use this code:
n3<-nls(proc~SSbiexp(cls,a,b,c,d),data=bline) and this is the error message:
Error in nls(y ~ cbind(exp(-exp(lrc1) * x), exp(-exp(lrc2) * x)), data =
xy, :
singular gradient
My data is like this:
structure(list(proc = c(387.177462830167, 508.090511433077,
321.836817656365,
151.226805860727,