[R] suggestions argument in rbga function in genalg package

Enrico Schumann enricoschumann at yahoo.de
Fri Sep 23 06:52:32 CEST 2011

I do not use this package, but a quick look at the code shows this.

if (!is.null(suggestions)) {
    # [deleted]
    suggestionCount = dim(suggestions)[1]

So 'suggestions' needs to have a dim argument (while the documentation 
speaks of an 'optional list of suggested chromosomes'). You could try

as.matrix(c(1,0.1,10, 100,1,100,1))

But I cannot tell if that solves your problem since you have not 
provided your objective function (ie, you have not provided the 
"commented, minimal, self-contained, reproducible code" that the footer 
of this message speaks about).


Am 22.09.2011 20:46, schrieb Joseph Boyer:
> Would someone be so kind as to provide example code where they use the suggestions argument in  the rgba function
> In genalg? I can't get it to work.
> The following code works just fine:
> GenFit<-rbga(Lower, Upper, evalFunc = evaluate)
> Lower and Upper are each numeric vectors with 7 elements. Evaluate is an objective function.
> However, when I want to use a suggested chromosome, I get an error message. My code is
> start<- c(1,0.1,10, 100,1,100,1)
> suggestions<- list(start)
> GenFit<-rbga(Lower, Upper, suggestions = suggestions, evalFunc = evaluate)
> The error message is:
> Error in 1:suggestionCount : argument of length 0
> Thanks.
> 	[[alternative HTML version deleted]]
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

Enrico Schumann
Lucerne, Switzerland

More information about the R-help mailing list