[R] suggestions argument in rbga function in genalg package

Frank Schwidom schwidom at gmx.net
Mon Apr 9 08:34:20 CEST 2012


On Thu, Sep 22, 2011 at 06:46:23PM +0000, Joseph Boyer wrote:
> 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.

rbga( c( -1, -1), c( 1, 1), evalFunc= function( string){ sum(
string**2)**0.5}, suggestions=t( as.data.frame( c( 0, 0))))

Regards



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