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sival
2004 Apr 14
4
Non-Linear Regression Problem
...to start the
Newton-Gauss Linearization least squares method when i have NO prior
information about the parameter.
W. N. Venables and B. D. Ripley (2002) "Modern Applied Statistics with S",
4 th ed., page 216-7 has a topic "Self-starting non-linear regressions"
using negexp.SSival - but i can not solve my hypothetical problem using
that - my problem is :
Y = EXP(-(THETA * t)) with data below for estimating THETA:
t Y
1 0.80
4 0.45
16 0.04
Whatever i could do, is in http://www.angelfire.com/ab5/get5/nonlinear.PDF
Any response / help / comment / suggestion / idea /...
2002 Mar 13
2
MASS Library
Hi,
I was just trying out an example on Page 247 of the MASS (Modern Applied
Statistics with S-plus) book and saw the function "negexp.ival".
It says it is supplied in the MASS library, however when I load the
library in R and typed:
negexp.ival
it says:
Error: Object "negexp.ival" not found
Does it mean it only appears in the MASS library for S-plus?