Re: [R] Pre-model Variable Reduction

2008-12-09 Thread Mark Difford
Hi Harsh, I looked for other R packages that allow me to do variable reduction without considering a dependent variable. Have look at package subselect. This has an implementation of the genetic algorithm, along with some other methods. It should do what you want. Regards, Mark. Harsh-7

Re: [R] Pre-model Variable Reduction

2008-12-09 Thread Frank E Harrell Jr
Harsh wrote: Hello All, I am trying to carry out variable reduction. I do not have information about the dependent variable, and have only the X variables as it were. In selecting variables I wish to keep, I have considered the following criteria. 1) Percentage of missing value in each

[R] Pre-model Variable Reduction

2008-12-09 Thread Harsh
Hello All, I am trying to carry out variable reduction. I do not have information about the dependent variable, and have only the X variables as it were. In selecting variables I wish to keep, I have considered the following criteria. 1) Percentage of missing value in each column/variable 2)

Re: [R] Pre-model Variable Reduction

2008-12-09 Thread Gabor Grothendieck
See: ?prcomp ?princomp On Tue, Dec 9, 2008 at 5:34 AM, Harsh [EMAIL PROTECTED] wrote: Hello All, I am trying to carry out variable reduction. I do not have information about the dependent variable, and have only the X variables as it were. In selecting variables I wish to keep, I have

Re: [R] Pre-model Variable Reduction

2008-12-09 Thread Hans W. Borchers
Harsh singhalblr at gmail.com writes: Hello All, I am trying to carry out variable reduction. I do not have information about the dependent variable, and have only the X variables as it were. ... I looked for other R packages that allow me to do variable reduction without considering a

Re: [R] Pre-model Variable Reduction

2008-12-09 Thread Ravi Varadhan
] On Behalf Of Gabor Grothendieck Sent: Tuesday, December 09, 2008 8:00 AM To: Harsh Cc: r-help@r-project.org Subject: Re: [R] Pre-model Variable Reduction See: ?prcomp ?princomp On Tue, Dec 9, 2008 at 5:34 AM, Harsh [EMAIL PROTECTED] wrote: Hello All, I am trying to carry out variable reduction

Re: [R] Pre-model Variable Reduction

2008-12-09 Thread Harsh
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gabor Grothendieck Sent: Tuesday, December 09, 2008 8:00 AM To: Harsh Cc: r-help@r-project.org Subject: Re: [R] Pre-model

Re: [R] Pre-model Variable Reduction

2008-12-09 Thread Mark Difford
] On Behalf Of Gabor Grothendieck Sent: Tuesday, December 09, 2008 8:00 AM To: Harsh Cc: r-help@r-project.org Subject: Re: [R] Pre-model Variable Reduction See: ?prcomp ?princomp On Tue, Dec 9, 2008 at 5:34 AM, Harsh [EMAIL PROTECTED] wrote: Hello All, I am trying to carry out

Re: [R] Pre-model Variable Reduction

2008-12-09 Thread Frank E Harrell Jr
Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gabor Grothendieck Sent: Tuesday, December 09, 2008 8:00 AM To: Harsh Cc: r-help@r-project.org Subject: Re: [R] Pre-model Variable Reduction See: ?prcomp ?princomp On Tue, Dec 9, 2008 at 5:34 AM, Harsh [EMAIL PROTECTED

Re: [R] Pre-model Variable Reduction

2008-12-09 Thread Mark Difford
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Gabor Grothendieck Sent: Tuesday, December 09, 2008 8:00 AM To: Harsh Cc: r-help@r-project.org Subject: Re: [R] Pre-model Variable Reduction See: ?prcomp ?princomp On Tue, Dec 9, 2008 at 5:34 AM