[R] Select only cases with negative values
maechler at stat.math.ethz.ch
Mon Oct 20 09:58:56 CEST 2008
>>>>> "MJ" == Michael Just <mgjust at gmail.com>
>>>>> on Sat, 18 Oct 2008 17:26:02 -0400 writes:
MJ> This code below from a R-help helper worked.
>> dat <-data.frame(f)
>> dat.lm <-lm(c~d, data=dat2)
But Henrique's advice, of using 'subset= d < 0' was really
better (in most respects I'd say). If it really did not work for you,
you have a strange (or broken?) R environment.
Again back to your example
c <- 1:10
d <- c(-1,2,-3,-4,5,6,-7,8,-9,10)
f <- cbind(c,d)
dat <- data.frame(f)
rm(c,d,f) ## << check to make sure 'c' or 'd' are not picked up from GlobalEnv [MM]
daN.lm <-lm(c ~ d, data = dat, subset = d < 0)
Does this really not work for you?
Martin Maechler, ETH Zurich
MJ> Thanks again,
MJ> Michael Just
MJ> On Sat, Oct 18, 2008 at 5:22 PM, Henrique Dallazuanna <wwwhsd at gmail.com> wrote:
>> Works for me.
>> dat.lm <-lm(c~d, data = dat, subset=d < 0)
>> Please see if you have dat with d and c columns names.
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