R does not subset

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of Katarzyna Kulma
Sent: Friday, May 03, 2013 4:21 AM
To: David Kulp
Cc: r-help at r-project.org
Subject: Re: [R] R does not subset

Jorge, thanks for your suggestions, but they give the same (empty) result:

RECinf<-subset(REC2,  INFECTION=="Infected")
head(RECinf)

[1] RINGNO    year      ccFLEDGE  rec2012   binage    INFECTION all.rsLD
<0 rows> (or 0-length row.names)

but David's suggestion worked! :

RECinf<-REC2[REC2$INFECTION=="Infected ",]
head(RECinf)

    RINGNO  year ccFLEDGE rec2012 binage INFECTION   all.rsLD
2  BX23298 Y2003        6       1    juv Infected  -6.1938776
4  BT53646 Y2003        5       2     ad Infected  -4.1938776
7  BT53248 Y2003        6       1     ad Infected  -2.1938776
11 BY75833 Y2004        5       0     ad Infected  -4.6574803
13 BX23067 Y2004        6       0     ad Infected  -3.6574803
17 BX24240 Y2004        6       0     ad Infected   0.3425197


still not sure why the subset() function didn't work, though.

Thanks for your help!