I just need to confirm something with pattern matching folks. I have a factor
with the following levels in a very large data set:
> levels(all$Classical.Statistic)
[1] "" "AB;ABD" "CollapsedSteps"
"CR_P" "CR_Prop;CR_P;AB"
[6] "NMK" "NMK;P" "NMK;P;ABD"
"P" "ABD"
[11] "CR_P;CollapsedSteps" "NMK;AB;ABD" "NMK;ABD"
"NMK;P;AB" "NMK;P;AB;ABD"
[16] "AB" "CRT;CollapsedSteps" "NMK;AB"
"CR_P;CRT;CollapsedSteps" "CR_Prop;CR_P"
I need to subset the rows in which the term "CollapsedSteps" appears. So, it
may appear as "CollapsedSteps" or may appear as "CR_P;CRT;CollapsedSteps" as
you can see above. I'm using grep as follows:
all[grep('CollapsedSteps', all$Classical.Statistic),]
to find any row in which the term "'CollapsedSteps" appears. Is this certain to
catch all cases, or is there an intricacy that I may have missed.
Thank you
Harold
> sessionInfo()
R version 2.10.1 (2009-12-14)
i386-pc-mingw32
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United States.1252
LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C LC_TIME=English_United States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] gdata_2.8.0
loaded via a namespace (and not attached):
[1] gtools_2.6.2 tools_2.10.1
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