Re: [R] Summary information by groups programming assitance

2008-12-22 Thread Gabor Grothendieck
D) >> USGS Montana Cooperative Fishery Research Unit >> Montana State University >> P.O. Box 173460 >> Bozeman, MT 59717-3460 >> >> phone: (406) 994-6643 >> fax: (406) 994-7479 >> >> http://studentweb.montana.edu/steven.ranney >> >&

Re: [R] Summary information by groups programming assitance

2008-12-22 Thread Gabor Grothendieck
ey > > > From: Gabor Grothendieck [mailto:ggrothendi...@gmail.com] > Sent: Mon 12/22/2008 5:15 PM > To: Ranney, Steven > Cc: r-help@r-project.org > Subject: Re: [R] Summary information by groups programming assitance > > > Here are two s

Re: [R] Summary information by groups programming assitance

2008-12-22 Thread hadley wickham
On Mon, Dec 22, 2008 at 7:15 PM, Ranney, Steven wrote: > Thank you all for your help. I appreciate the assistance. I'm thinking I > should have been more specific in my original question. > > Unless I'm mistaken, all of the suggestions so far have been for maximum vol > and maximum Length by La

Re: [R] Summary information by groups programming assitance

2008-12-22 Thread Ranney, Steven
8 5:15 PM To: Ranney, Steven Cc: r-help@r-project.org Subject: Re: [R] Summary information by groups programming assitance Here are two solutions assuming DF is your data frame: # 1. aggregate is in the base of R aggregate(DF[c("Length", "vol")], DF[c("Lake", "

Re: [R] Summary information by groups programming assitance

2008-12-22 Thread Gabor Grothendieck
Here are two solutions assuming DF is your data frame: # 1. aggregate is in the base of R aggregate(DF[c("Length", "vol")], DF[c("Lake", "psd")], max) or the following which is the same except it labels psd as Category: aggregate(DF[c("Length", "vol")], with(DF, list(Lake = Lake, Category = psd

Re: [R] Summary information by groups programming assitance

2008-12-22 Thread William Revelle
Sendt: ma 22-12-2008 22:51 Til: r-help@r-project.org Emne: [R] Summary information by groups programming assitance All - I have data that looks like psd Species Lake Length WeightSt.weightWr Wr.1 vol 432 substock SMB Clear150 41.00 0.01 95.12438

Re: [R] Summary information by groups programming assitance

2008-12-22 Thread Søren Højsgaard
Maybe summaryBy (or lapplyBy/splitBy) in the doBy package might help you. Regards Søren Fra: r-help-boun...@r-project.org på vegne af Ranney, Steven Sendt: ma 22-12-2008 22:51 Til: r-help@r-project.org Emne: [R] Summary information by groups programming assitance

Re: [R] Summary information by groups programming assitance

2008-12-22 Thread hadley wickham
On Mon, Dec 22, 2008 at 3:51 PM, Ranney, Steven wrote: > All - > > I have data that looks like > > psd Species Lake Length WeightSt.weightWr > Wr.1 vol > 432 substock SMB Clear150 41.00 0.01 95.12438 > 95.10118 0.0105 > 433 substock SMB Clea

[R] Summary information by groups programming assitance

2008-12-22 Thread Ranney, Steven
All - I have data that looks like psd Species Lake Length WeightSt.weightWr Wr.1 vol 432 substock SMB Clear150 41.00 0.01 95.12438 95.10118 0.0105 433 substock SMB Clear152 39.00 0.01 86.72916 86.70692 0.0105 434 substock