[R] optim

[Adrienne Gret-Regamey]

Hello:

I am trying to use optim() to estimate the maximum likelihood of a 
function a*x^b = y.
Unfortunately, I always get the error, that there is no default value for b.

Could you give me an example, on how to correctly optimize this function 
with input data x<-c(1,3,11,14).

Thanks a lot,

Adrienne

-- 
***********************************************************************
Adrienne Grêt-Regamey          			
LEP, Landscape and Environmental Planning,
HIL H 31.2, ETH Hönggerberg
CH - 8093 Zürich

Phone: +41/1/633'30'02 or +41/31/971'53'74
Fax:   +41/1/633'10'84 	
http://lep.ethz.ch/