Thanks Peter:
For others who are interested, the first one one with [-indices,] doesn't
really do, because the first level of indices are the component names. eg, if I
have a data frame with variables, name, DOB, gender, then by using the first
choice, I'm merely deleting lists of variables, but thanks Peter for the second
trick. That one works for deleting the actually data entries.
Karen> Subject: RE: [R] deleting certain observations in a data frame> Date:
Fri, 15 Feb 2008 10:05:39 +1300> From: [EMAIL PROTECTED]> To: [EMAIL
PROTECTED]; r-help@r-project.org> > Karen> > For indices, use the minus sign:
yourData[-indicesToBeDeleted,]> > For rownames, negate %in%:>
yourData[!rownames(yourData)%in%namesToBeDeleted,] > > HTH> > Peter Alspach> >
> -----Original Message-----> > From: [EMAIL PROTECTED] > > [mailto:[EMAIL
PROTECTED] On Behalf Of Chang Liu> > Sent: Friday, 15 February 2008 9:50 a.m.>
> To: r-help@r-project.org> > Subject: [R] deleting certain observations in a
data frame> > > > > > Hi, I'm wondering what the fastest way is to delete
certain > > data points (observations) in a data frame. > > I have a vector of
the indices/row.names I would like to > > delete. I have tried replacing list
by list, but it always > > complains about different lengths, "replacing list
of length > > a with length b" and so on.> > >!
> Another way to think of it is that it's a generazation of > > na.rm I
guess.> > > > Thanks,> > Karen> >
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