Displaying 1 result from an estimated 1 matches for "traceson".
2008 Aug 29
1
nls() fails on a simple exponential fit, when lm() gets it right?
...ng MS Excel and the numbers returned are
exactly as for the 'simpler ways', so nls is definitely in the wrong, but
the self-start is almost identical to the one for the logarithmic fit,
which works perfectly ....
I can't see my mistake at all. Can anyone help??
Thanks,
Toby Marthews
traceson=FALSE;maxint=10000;minstepfactor=2^(-30);tolerance=1e-7
xtxt="DBH in mm";ytxt="Height in m"
dbh=c(0.9,1.0,1.1,1.2,4.8,4.9,5.0,5.1,8.9,9.0,9.1,9.2,11.8,11.9,12.0,12.1,14.9,15.1,15.2,15.5)
height=c(5.770089,5.154794,4.888847,6.356770,14.849109,14.973146,15.423816,14.865038,21.3359...