[R] Optimization problem: selecting independent rows to maximizethe mean

2006-03-06 Thread Jasjeet S. Sekhon
> Does R have packages for such multi-objectives optimization problems ? The "rgenoud" (R-GENetic Optimization Using Derivatives) package allows for multiple object optimization problems. See the "lexical" option which searches for the Pareto front. The package is written for NP-hard problems (b

Re: [R] Optimization problem: selecting independent rows to maximizethe mean

2006-03-04 Thread Spencer Graves
Regarding multi-object optimization, I just got 0 hits from RSiteSearch("multi-objective optimization") and RSiteSearch("multiobjective optimization"). However, it shouldn't be too difficult to write a wrapper function to blend other functions however you would like, then use "optim"

Re: [R] Optimization problem: selecting independent rows to maximizethe mean

2006-03-02 Thread nojhan
Le Wed, 01 Mar 2006 13:07:07 -0800, Berton Gunter a écrit : > 2) That the mean and sd can be simultaneously optimized as you describe-- > what if the subset with maximum mean also has bigger than minimal sd? Then you have two choices : 1) balance the two objectives with weights, according to the i

Re: [R] Optimization problem: selecting independent rows to maximizethe mean

2006-03-01 Thread Berton Gunter
MAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Mark > Sent: Wednesday, March 01, 2006 12:40 PM > To: r-help@stat.math.ethz.ch > Subject: [R] Optimization problem: selecting independent rows > to maximizethe mean > > Dear R community, > > I have a dataframe wi