Re: [R] DROP OBSEVATION IN A GROUP

2011-06-30 Thread Jorge Ivan Velez
sum(n==0)>2)) > Peter Maclean > Department of Economics > UDSM > > > > - Original Message > From: Duncan Murdoch <> > To: Peter Maclean <> > Cc: > Sent: Wed, June 29, 2011 3:33:25 PM > Subject: Re: [R] DROP OBSEVATION IN A GROUP > > On 29/0

Re: [R] DROP OBSEVATION IN A GROUP

2011-06-29 Thread Peter Maclean
I tried this but did not work: z0<- by(z, z[,"n"], function(x) subset(x, sum(n==0)>2))  Peter Maclean Department of Economics UDSM - Original Message From: Duncan Murdoch To: Peter Maclean Cc: r-help@r-project.org Sent: Wed, June 29, 2011 3:33:25 PM Subject: Re: [R]

Re: [R] DROP OBSEVATION IN A GROUP

2011-06-29 Thread Duncan Murdoch
On 29/06/2011 4:29 PM, Peter Maclean wrote: People with more experience in R I need help on this. I would like to drop observation if they meet certain condition. In this example I would like to drop group 2 in "n" because the group in "Y" has more than 2 zeroes. #Example n<- c(1, 1, 1, 1, 1, 1,

Re: [R] DROP OBSEVATION IN A GROUP

2011-06-29 Thread Peter Maclean
People with more experience in R I need help on this. I would like to drop observation if they meet certain condition. In this example I would like to drop group 2 in "n" because the group in "Y" has more than 2 zeroes.  #Example n <- c(1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3,3) y <-