I know that with a vector such as
v <- c("MA", "NY", "PA")
names(v) <- c("Massachusetts", "New York", "Pennsylvania")
It is possible to get a value from a name using syntax such as
v["New York"]
But is it possible to get a name from a value (like the PHP key() function)? Thanks.
Lots of ways to do this.
names(v)[v == "NY"] # extract the names, subset by equality to NY
# or
names(which(v == "NY")) # extract entries that == NY and get names
to name a few.
Use match
names(v)[match("NY",v)]
or use which
names(v)[which(v=="NY")]
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