In the course of slicing-and-dicing some data, I had occasion to create a list
like this:
list(
subset(my_dataframe, GR1=="XX1"),
subset(my_dataframe, GR1=="XX2"),
subset(my_dataframe, GR1=="YY"),
subset(my_dataframe, GR1 %in% c("XX1", "XX2")),
subset(my_dataframe, GR2=="Remission"),
subset(my_dataframe, GR2=="Relapse"))
I used %in% only once, because there was only one "compound value" (XX1 or XX2)
for subsetting. But then it occurred to me to use %in% everywhere, taking
advantage of the fact that a scalar value is the same as a length-1 vector:
list(
subset(my_dataframe, GR1 %in% "XX1"),
subset(my_dataframe, GR1 %in% "XX2"),
subset(my_dataframe, GR1 %in% "YY"),
subset(my_dataframe, GR1 %in% c("XX1", "XX2")),
subset(my_dataframe, GR2 %in% "Remission"),
subset(my_dataframe, GR2 %in% "Relapse"))
It works just fine. Are there any problems with this style, from the
standpoints of correctness, aesthetics, etc.?
-John
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