Hi,
Can anyone explain why the nls function is giving an error?
Thanks
Tom
> head(d)
age time
1 23.566667 223.0
2 42.633333 223.0
3 62.300000 222.0
4 32.933333 220.5
5 9.366667 228.0
6 23.833333 227.0
> fit<-nls(d$time~a1*exp(b1*d$age) +
a2*exp(b2*d$age)+c
,start(a1=10,b1=0,a2=250,b2=1,c=0)
,trace=T)
Error in hasTsp(x) : argument "x" is missing, with no default
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