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

2009-07-09 Thread utkarshsinghal
...@imail.org 801.408.8111 *From:* utkarshsinghal [mailto:utkarsh.sing...@global-analytics.com] *Sent:* Wednesday, July 08, 2009 2:24 AM *To:* Greg Snow *Cc:* Thomas Lumley; r help *Subject:* Re: [R] bigglm() results different from glm()+Another question Hi Greg, Many thanks for your

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

2009-07-08 Thread utkarshsinghal
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 chunksizes are all equal. I also crosschecked by manually creating the chunks and updating as in example given on biglm help page. ?biglm

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

2009-07-08 Thread Greg Snow
Healthcare greg.s...@imail.orgmailto: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

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

2009-07-07 Thread utkarshsinghal
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 highly dependent

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

2009-07-07 Thread Greg Snow
. 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] bigglm() results different from glm()+Another question Trust

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:

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