[R] Basic vector logic not working
Peter.Brecknock at bp.com
Sat Jul 9 21:08:24 CEST 2011
> I am interning in a computer science lab and I'm very new to R. The
> language basics are clear, but this particular problem isn't:
> I have a very large dataframe called "data" which holds data from Halo
> matches. I'm trying to analyze a certain window such that data$deaths>20
> and data$deaths<=27.
> When I enter the line
> kills = data$kills[data$deaths>20]
> or any single condition, it selects the region I want. However, when I
> kills = data$kills[data$deaths>20 && data$deaths<=27]
> "kills" becomes the entire vector data$kills, without selecting any
> specific region.
> This is a simple problem, but I can't find anything wrong. How could I fix
Maybe something like ...
# example data
d = data.frame(age=1:20, names=letters[1:20])
# 1. subset using [
d[d$age>10 & d$age<16,]
# 2. subset using subset function
subset(d,d$age>10 & d$age<16)
View this message in context: http://r.789695.n4.nabble.com/Basic-vector-logic-not-working-tp3656465p3656594.html
Sent from the R help mailing list archive at Nabble.com.
More information about the R-help