Hi everyone,
I know there have been several requests regarding subsetting before, but
none of them really helps with my problem:
I'm trying to subset only infected individuals from the REC2 data.frame:
> str(REC2)
'data.frame': 362 obs. of 7 variables:
$ RINGNO : Factor w/ 370 levels "BL17546","BL17577",..: 78 81 67 41 58
66 17
$ year : Factor w/ 8 levels "Y2002","Y2003",..: 1 2 1 2 1 1 2 1 1 3 ...
$ ccFLEDGE : int 6 6 6 5 6 7 6 7 6 5 ...
$ rec2012 : int 2 1 2 2 1 2 1 1 1 0 ...
$ binage : Factor w/ 2 levels "ad","juv": 1 2 1 1 1 1 1 1 1 1 ...
$ INFECTION: Factor w/ 2 levels "Infected ","Uninfected ": 2 1 2 1 2 2 1 2
2 1 ...
$ all.rsLD : num -4.62 -6.19 -3.62 -4.19 -2.62 ...
using either
RECinf<-REC2[which (REC2$INFECTION=="Infected"),]
or
RECinf<-subset(REC2, INFECTION=="Infected")
in both cases I get empty data frame (0 observations):
> str(RECinf)
'data.frame': 0 obs. of 7 variables:
$ RINGNO : Factor w/ 370 levels "BL17546","BL17577",..:
$ year : Factor w/ 8 levels "Y2002","Y2003",..:
$ ccFLEDGE : int
$ rec2012 : int
$ binage : Factor w/ 2 levels "ad","juv":
$ INFECTION: Factor w/ 2 levels "Infected ","Uninfected ":
$ all.rsLD : num
When subsetting, R doesn't return any warning or error message. Besides, I
used same codes many times before and they worked perfectly well. Any ideas
why this case is different?
Thanks for your help,
Kasia
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