Re: [R] bigglm() results different from glm()+Another question

2009-07-08 Thread utkarshsinghal
#x27;t have xx, so we can't just run the code > below, you could include a line to randomly generate an xx, or a link > to where a copy of xx can be downloaded from). It also helps if you > mention any errors or warnings that you receive in the process of > running you

Re: [R] bigglm() results different from glm()+Another question

2009-07-08 Thread Greg Snow
rg> 801.408.8111 From: utkarshsinghal [mailto:utkarsh.sing...@global-analytics.com] Sent: Tuesday, July 07, 2009 12:10 AM To: Greg Snow Cc: Thomas Lumley; r help Subject: Re: [R] bigglm() results different from glm()+Another question Trust me, it is the same total data I am using, even the ch

Re: [R] bigglm() results different from glm()+Another question

2009-07-08 Thread utkarshsinghal
Hope this helps, > > > > -- > > Gregory (Greg) L. Snow Ph.D. > > Statistical Data Center > > Intermountain Healthcare > > greg.s...@imail.org > > 801.408.8111 > > > > *From:* utkarshsinghal [mailto:utkarsh.sing...@global-analytics.com]

Re: [R] bigglm() results different from glm()+Another question

2009-07-07 Thread Greg Snow
code. Hope this helps, -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 From: utkarshsinghal [mailto:utkarsh.sing...@global-analytics.com] Sent: Tuesday, July 07, 2009 12:10 AM To: Greg Snow Cc: Thomas Lumley; r help Subject: Re: [R]

Re: [R] bigglm() results different from glm()+Another question

2009-07-06 Thread utkarshsinghal
er > > Intermountain Healthcare > > greg.s...@imail.org > > 801.408.8111 > > > > *From:* utkarshsinghal [mailto:utkarsh.sing...@global-analytics.com] > *Sent:* Monday, July 06, 2009 8:58 AM > *To:* Thomas Lumley; Greg Snow > *Cc:* r help > *Subject:* Re: [

Re: [R] bigglm() results different from glm()+Another question

2009-07-06 Thread Greg Snow
Intermountain Healthcare greg.s...@imail.org 801.408.8111 From: utkarshsinghal [mailto:utkarsh.sing...@global-analytics.com] Sent: Monday, July 06, 2009 8:58 AM To: Thomas Lumley; Greg Snow Cc: r help Subject: Re: [R] bigglm() results different from glm()+Another question The AIC of the biglm models is

Re: [R] bigglm() results different from glm()+Another question

2009-07-06 Thread utkarshsinghal
The AIC of the biglm models is highly dependent on the size of chunks selected (example provided below). This I can somehow expect because the model error will increase with the number of chunks. It will be helpful if you can provide your opinion for comparing different models in such cases: