Displaying 1 result from an estimated 1 matches for "expfit".
2008 Aug 29
1
nls() fails on a simple exponential fit, when lm() gets it right?
...elfit)$coefficients[2]
cat("Best exponential fit is (",ytxt,")=(A*exp(r*(",xtxt,"))) with
parameters r=",bfr,"and A=",bfA,"\n")
#Produces: Best exponential fit is ( Height in m )=(A*exp(r*( DBH in mm
))) with parameters r= 0.07134055 and A= 9.47907
expfit=lm(log(height)~dbh) #This is doing the exp fit without a self-start
function
cat("Done another, simpler, way, the best exponential fit has parameters:
r=",expfit$coefficients[2],"and A=",exp(expfit$coefficients[1]),"\n")
#Produces: Done another, simpler, way, the best...