[R] Select only cases with negative values
mgjust at gmail.com
Sat Oct 18 23:22:24 CEST 2008
Thanks for the response. However, ...
> dat.neg <- dat[dat$d < 0, ]
Error in dat[dat$d < 0, ] : incorrect number of dimensions
In addition: Warning message:
$ operator is deprecated for atomic vectors, returning NULL in: dat$d
Any other ideas?
On Sat, Oct 18, 2008 at 5:18 PM, Johannes Hüsing <johannes at huesing.name> wrote:
> Am 18.10.2008 um 23:03 schrieb Michael Just:
>> I was wondering if there was a way to only select cases my from data
>> frame that contained a negative value?
>>> d<- c(-1,2,-3,-4,5,6,-7,8,-9,10)
>>> f <- cbind(c,d)
>>> dat <-data.frame(f)
>>> dat.lm <-lm(c~d)
>> If I wanted to only use the rows that had a negative value in column d
>> for my regression, how could I make that selection?
> dat[dat$d < 0, ]
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