Re: [R] create dummy variables by for loop

2011-02-24 Thread Changbin Du
Leetown Road > >> Kearneysville WV, 25430 > >> (304) 724-4480 > >> "Is the room still a room when its empty? Does the room, > >> the thing itself have purpose? Or do we, what's the word... imbue it." > >> - Jubal Early, Fire

Re: [R] create dummy variables by for loop

2011-02-24 Thread Dimitri Liakhovitski
  - Jubal Early, Firefly >> >> r-help-boun...@r-project.org wrote on 02/24/2011 01:23:54 PM: >> >> > [image removed] >> > >> > [R] create dummy variables by for loop >> > >> > Changbin Du >> > >> > to: >> > >>

Re: [R] create dummy variables by for loop

2011-02-24 Thread Changbin Du
Thanks, David! On Thu, Feb 24, 2011 at 11:30 AM, David Winsemius wrote: > > On Feb 24, 2011, at 1:23 PM, Changbin Du wrote: > > HI, Dear R community, >> >> I try to create 100 dummy variables like the following: >> >> ack$id_1 <- (ack$ID==1)*1 >> ack$id_2 <- (ack$ID==2)*1 >> .. >> . >> ack$id_100

Re: [R] create dummy variables by for loop

2011-02-24 Thread David Winsemius
On Feb 24, 2011, at 1:23 PM, Changbin Du wrote: HI, Dear R community, I try to create 100 dummy variables like the following: ack$id_1 <- (ack$ID==1)*1 ack$id_2 <- (ack$ID==2)*1 .. . ack$id_100 <- (ack$ID==100)*1 I used the following codes: for(i in 1:100){ ack$id_[i] <- (ack$

Re: [R] create dummy variables by for loop

2011-02-24 Thread Changbin Du
> "Is the room still a room when its empty? Does the room, > the thing itself have purpose? Or do we, what's the word... imbue it." > - Jubal Early, Firefly > > r-help-boun...@r-project.org wrote on 02/24/2011 01:23:54 PM: > > > [image removed] > &

Re: [R] create dummy variables by for loop

2011-02-24 Thread Jonathan P Daily
d... imbue it." - Jubal Early, Firefly r-help-boun...@r-project.org wrote on 02/24/2011 01:23:54 PM: > [image removed] > > [R] create dummy variables by for loop > > Changbin Du > > to: > > > > 02/24/2011 01:25 PM > > Sent by: > > r-

[R] create dummy variables by for loop

2011-02-24 Thread Changbin Du
HI, Dear R community, I try to create 100 dummy variables like the following: ack$id_1 <- (ack$ID==1)*1 ack$id_2 <- (ack$ID==2)*1 .. . ack$id_100 <- (ack$ID==100)*1 I used the following codes: for(i in 1:100){ ack$id_[i] <- (ack$ID==i)*1 } But only one colum