Re: [R] reference on contr.helmert and typo on its help page.

2009-11-10 Thread Gavin Simpson
On Mon, 2009-11-09 at 19:31 -0600, Peng Yu wrote: On Sun, Nov 8, 2009 at 7:32 PM, John Fox j...@mcmaster.ca wrote: Dear Peng, I'm tempted to try to get an entry in the fortunes package but will instead try to answer your questions directly: I can not install 'fortunes'. What are the

Re: [R] reference on contr.helmert and typo on its help page.

2009-11-09 Thread Peng Yu
On Sun, Nov 8, 2009 at 7:32 PM, John Fox j...@mcmaster.ca wrote: Dear Peng, I'm tempted to try to get an entry in the fortunes package but will instead try to answer your questions directly: I can not install 'fortunes'. What are the fortunes packages about? install.packages(fortunes,

Re: [R] reference on contr.helmert and typo on its help page.

2009-11-08 Thread David Winsemius
On Nov 8, 2009, at 11:03 AM, Peng Yu wrote: I'm wondering which textbook discussed the various contrast matrices mentioned in the help page of 'contr.helmert'. Could somebody let me know? My version of Modern Applied Statistics in S (aka MASS) deals with it in enough detail for a person

Re: [R] reference on contr.helmert and typo on its help page.

2009-11-08 Thread Gabor Grothendieck
On Sun, Nov 8, 2009 at 11:59 AM, Peng Yu pengyu...@gmail.com wrote: On Sun, Nov 8, 2009 at 10:11 AM, Duncan Murdoch murd...@stats.uwo.ca wrote: On 08/11/2009 11:03 AM, Peng Yu wrote: I'm wondering which textbook discussed the various contrast matrices mentioned in the help page of

Re: [R] reference on contr.helmert and typo on its help page.

2009-11-08 Thread Peter Dalgaard
Gabor Grothendieck wrote: On Sun, Nov 8, 2009 at 11:59 AM, Peng Yu pengyu...@gmail.com wrote: On Sun, Nov 8, 2009 at 10:11 AM, Duncan Murdoch murd...@stats.uwo.ca wrote: On 08/11/2009 11:03 AM, Peng Yu wrote: I'm wondering which textbook discussed the various contrast matrices mentioned in

Re: [R] reference on contr.helmert and typo on its help page.

2009-11-08 Thread Peng Yu
On Sun, Nov 8, 2009 at 11:28 AM, Peter Dalgaard p.dalga...@biostat.ku.dk wrote: Gabor Grothendieck wrote: On Sun, Nov 8, 2009 at 11:59 AM, Peng Yu pengyu...@gmail.com wrote: On Sun, Nov 8, 2009 at 10:11 AM, Duncan Murdoch murd...@stats.uwo.ca wrote: On 08/11/2009 11:03 AM, Peng Yu wrote:

Re: [R] reference on contr.helmert and typo on its help page.

2009-11-08 Thread John Fox
Dear Peng Yu, Perhaps you're referring to my text, Applied Linear Regression Analysis and Generalized Linear Models, since I seem to recall that you sent me a number of questions about it. See Section 9.1.2 on linear contrasts for the answer to your question. I hope this helps, John

Re: [R] reference on contr.helmert and typo on its help page.

2009-11-08 Thread Peng Yu
Dear John, I did read Section 9.1.2 and various other textbooks before posting my questions. But each reference uses slightly different notations and terminology. I get confused and would like a description that summaries everything so that I don't have to refer to many different resources. May I

Re: [R] reference on contr.helmert and typo on its help page.

2009-11-08 Thread John Fox
Dear Peng, I'm tempted to try to get an entry in the fortunes package but will instead try to answer your questions directly: -Original Message- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Peng Yu Sent: November-08-09 7:41 PM To: