Re: [R] Two-way/Three-way sum.

Thanks again! On Thu, Dec 3, 2009 at 2:19 PM, David Winsemius wrote: > > On Dec 3, 2009, at 2:14 PM, Peng Cai wrote: > > Also, can I control for number of decimal places printed. Like when I use > "mean" function. By default it shows upto 7 dec. Thanks! > > > > print(4.567891234, digits=3) > [1]

Re: [R] Two-way/Three-way sum.

On Dec 3, 2009, at 2:14 PM, Peng Cai wrote: > Also, can I control for number of decimal places printed. Like when > I use "mean" function. By default it shows upto 7 dec. Thanks! > print(4.567891234, digits=3) [1] 4.57 > > > On Thu, Dec 3, 2009 at 2:08 PM, Peng Cai > wrote: > Thanks Davi

Re: [R] Two-way/Three-way sum.

Also, can I control for number of decimal places printed. Like when I use "mean" function. By default it shows upto 7 dec. Thanks! On Thu, Dec 3, 2009 at 2:08 PM, Peng Cai wrote: > Thanks David for your suggestions. > > > On Thu, Dec 3, 2009 at 2:03 PM, David Winsemius wrote: > >> >> On Dec 3,

Re: [R] Two-way/Three-way sum.

Thanks David for your suggestions. On Thu, Dec 3, 2009 at 2:03 PM, David Winsemius wrote: > > On Dec 3, 2009, at 1:50 PM, Peng Cai wrote: > > Hi R Users, >> >> I'm wondering how can I calculate two (or three) way sum of a variable. A >> sample data is: >> >> State Month Year Value >> NC Jan 1996

Re: [R] Two-way/Three-way sum.

On Dec 3, 2009, at 1:50 PM, Peng Cai wrote: Hi R Users, I'm wondering how can I calculate two (or three) way sum of a variable. A sample data is: State Month Year Value NC Jan 1996 1 NC Jan 1996 2 NC Feb 1997 2 NC Feb 1997 3 NC Mar 1998 3 NC Mar 1998 4 NY Jan 1996 4 NY Jan 1996 5 NY Feb 19

Re: [R] Two-way/Three-way sum.

Thanks Greg, Jorge, and Jim for your help. Peng On Thu, Dec 3, 2009 at 1:58 PM, jim holtman wrote: > try this: > > > x >State Month Year Value > 1 NC Jan 1996 1 > 2 NC Jan 1996 2 > 3 NC Feb 1997 2 > 4 NC Feb 1997 3 > 5 NC Mar 1998 3 > 6

Re: [R] Two-way/Three-way sum.

Hi Peng, Here is a suggestion using tapply: R> with(x, tapply(Value, list(State, Month), FUN = sum)) R> with(x, tapply(Value, list(State, Year), FUN = sum)) R> with(x, tapply(Value, list(State, Year, Month), FUN = sum)) with 'x' your data set. Please take a look at ?tapply for more information.

Re: [R] Two-way/Three-way sum.

try this: > x State Month Year Value 1 NC Jan 1996 1 2 NC Jan 1996 2 3 NC Feb 1997 2 4 NC Feb 1997 3 5 NC Mar 1998 3 6 NC Mar 1998 4 7 NY Jan 1996 4 8 NY Jan 1996 5 9 NY Feb 1997 5 10NY Feb 1997

Re: [R] Two-way/Three-way sum.

?tapply -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -Original Message- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r- > project.org] On Behalf Of Peng Cai > Sent: Thursday, December 03, 2009 11:50 AM