[R] plotting predicted values (lines) over data?

[Jeff D. Hamann]

I've been trying to plot the predicted values, as a line, over the data for
a simple nonlinear fit with the following commands:

plot( hg ~ ht )
... define some function hg ~ ht + junk ...
... blah, blah, obtain parameter estimates and predicted values, blah...
... then...
lines( sort( $predicted ) ~ sort( ht ) )

which results in a line that isn't smooth (which I knew would happen). I've
checked the FAQ,docs and archives and I'm not sure if there's function that
will so what Heut et. al (2004) do with their plfit(). So, is there already
an R function, or process to do this, or will I have to write one?

Thanks,
Jeff.

---
Jeff D. Hamann
Forest Informatics, Inc.
PO Box 1421
Corvallis, Oregon USA 97339-1421
(office) 541-754-1428
(cell) 541-740-5988
jeff.hamann at forestinformatics.com
www.forestinformatics.com