Displaying 3 results from an estimated 3 matches for "maxfeval".
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maxeval
2012 Nov 05
1
Error message in nmkb()
Hallo together,
I am trying to use the nmkb() optimizer and I have problems using the
function, as it causes the following error message
Fehler (error)* in while (nf < maxfeval & restarts < restarts.max & dist >
ftol & :
Fehlender Wert (missing value)* , wo (where)* TRUE/FALSE n?tig ist (is
required)*
*translation
Do I need to adjust the control ?
my.optpar3<-nmkb(par=par.start,fn=my.loglike.normal,lower=constLo,upper=999,
control=list(restarts...
2012 Sep 16
1
trying to obtain same nls parameters as in example
Dear R-users;
I'm working with a a dataset that was previously used to fit a
nonlinear model of the form:
Y ~ a * (1 + b * log(1 - c * X^d))
The parameters published elsewhere are:
a = 1.758863, b = .217217, c = .99031, and d = .054589
However, there is no way I can replicate this result. I've tried
several options (including SAS) w/o success.
The data is:
X <-
2011 Mar 15
1
Problem with nls.lm function of minpack.lm package.
Dear R useRs,
I have a problem with nls.lm function of minpackl.lm package.
I need to fit the Van Genuchten Model to a set of data of Theta and hydraulic conductivity with nls.lm function of minpack.lm package.
For the first fit, the parameter estimates keep changing even after 1000 iterations (Th)
and
I have a following error message for fit of hydraulic conductivity (k);
Reason for