Re: [R] regression modeling

2006-04-26 Thread John Maindonald
lt;[EMAIL PROTECTED]> > Cc: 'r-help' > Subject: Re: [R] regression modeling > > > May I offer a perhaps contrary perspective on this. > > Statistical **theory** tells us that the precision of estimates > improves as > sample size increases. However, in prac

Re: [R] regression modeling

2006-04-25 Thread Frank E Harrell Jr
Berton Gunter wrote: > May I offer a perhaps contrary perspective on this. > > Statistical **theory** tells us that the precision of estimates improves as > sample size increases. However, in practice, this is not always the case. > The reason is that it can take time to collect that extra data, a

Re: [R] regression modeling

2006-04-25 Thread Berton Gunter
process." - George E. P. Box > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Weiwei Shi > Sent: Tuesday, April 25, 2006 12:10 PM > To: bogdan romocea > Cc: r-help > Subject: Re: [R] regression modeling > > i bel

Re: [R] regression modeling

2006-04-25 Thread Weiwei Shi
ry/predictive potential of a dataset vary as the dataset gets > larger and larger? > > > > -Original Message- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Weiwei Shi > > Sent: Monday, April 24, 2006 12:45 PM > > To: r-help >

Re: [R] regression modeling

2006-04-25 Thread bogdan romocea
> [mailto:[EMAIL PROTECTED] On Behalf Of Weiwei Shi > Sent: Monday, April 24, 2006 12:45 PM > To: r-help > Subject: [R] regression modeling > > Hi, there: > I am looking for a regression modeling (like regression > trees) approach for > a large-scale industry dataset. Any sugge

[R] regression modeling

2006-04-24 Thread Weiwei Shi
Hi, there: I am looking for a regression modeling (like regression trees) approach for a large-scale industry dataset. Any suggestion on a package from R or from other sources which has a decent accuracy and scalability? Any recommendation from experience is highly appreciated. Thanks, Weiwei --

[R] Regression Modeling Strategies Workshop by Frank Harrell in Southern California

2005-04-05 Thread Madeline Bauer
Dr. Frank E. Harrell, Jr., Professor and Chair of the Department of Biostatistics at Vanderbilt University is giving a one-day workshop on Regression Modeling Strategies on Friday, April 29, 2005. Analyses of the example datasets use R/S-Plus and make extensive use of the Hmisc library written

[R] Regression Modeling Strategies Short Course

2004-07-21 Thread Harrell, Frank E
I will be giving a one-day short course related to my book Regression Modeling Strategies in Toronto as part of the Joint Statistical Meetings on August 8. For more information visit the American Statistical Association web site amstat.org and biostat.mc.vanderbilt.edu/rms. The course applies

RE: [R] Regression Modeling query

2004-06-22 Thread Liaw, Andy
nd coding my own R functions and possess a sound > familiarity with > Numerical Linear Algebra and Matrix theory. Secondly, i don't > want to dig > deep into books to find little useful. Any references that > you provide will > be pretty helpful > > Please advise

Re: [R] Regression Modeling query

2004-06-22 Thread devshruti pahuja
helpful Please advise -Dev From: Berton Gunter <[EMAIL PROTECTED]> To: devshruti pahuja <[EMAIL PROTECTED]> Subject: Re: [R] Regression Modeling query Date: Tue, 22 Jun 2004 13:44:13 -0700 MIME-Version: 1.0 X-Sender: "Berton Gunter" <[EMAIL PROTECTED]> Received: from c

Re: [R] Regression Modeling query

2004-06-22 Thread devshruti pahuja
ason where as in men's tennis it's fluctuating. Also, i would like to which age group reflects the prime of a tennis player and hence i've changed continuous variables to categorical. Please advise Thanks -Dev From: "Peter Flom" <[EMAIL PROTECTED]> To: <[EMAIL P

[R] Regression Modeling query

2004-06-22 Thread devshruti pahuja
Hi All I received a raw data set with one record per tennis player (both male and female) and then i cured it by aggregation i.e by 4 age groups, 2 gender levels and 6 income levels. Gender and Income are categorical variables. Please advise me how to use 'R' to model this data set (Actually, i