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log_p
2013 Jul 09
3
fitting log function: errors using nls and nlxb
Hi-
I am trying to fit a log function to my data, with the ultimate goal of
finding the second derivative of the function. However, I am stalled on
the first step of fitting a curve.
When I use the following code:
FG2.model<-(nls((CO2~log(a*Time)+b), start=setNames(coef(lm(CO2 ~
log(Time), data=FG2)), c("a", "b")),data=FG2))
I get the following error:
Error in