Jörg Groß wrote:
I have a problem sorting a table;
When I read a table into R by x <- read.table() I get something like this:
V1 V2 V3
yes 1 3
no 2 6
yes 3 9
no 4 12
Now I want to generate a vector of V2.
But R should only put in the numbers of V2 into the new vector when
there is the entry "yes" in V1.
x <- data.frame(V1 = factor(c("yes", "no", "yes", "no")), V2 = 1:4)
# vector as result
newVector <- x$V2[x$V1 == "yes"]
newVector
# subsetting a data.frame
newX <- subset(x, V1 == "yes")
newX
HTH,
Tobias
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