[R] nls and if statements

[DWatts]

Peter Ehlers wrote
> 
> 
>>
> 
> If the above data is all you have, I wouldn't chugg too long.
> Looking at plots of Cfl~Pw and Cfl~Tsoil says to me that you
> have far too much variability to fit your model.
> 
> You might find this plot instructive:
> 
>    library(rgl)
>    plot3d(Pw, Tsoil, Cfl, col=1+(Pw<5), size=5)
> 
> 
> Peter Ehlers
> 
> 
I hadn't realized there was such a package, and wow, do I ever wish I'd
learned of that plot3d sooner!
I did have a substantially larger data set to work with, but after a much
more careful look I realized it would never fit the extra param to the low
Pw numbers-- the predictability just isn't there. The 3d plot confirms this,
of course. I did, however, get the help I was looking for, so thank you all!

Danielle

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