Assign names to variable using regular expression in R

Question

So I have a bunch of variables in my workspace. I want to assign a subset of them to a new variable, so I can easily run functions on this subset:

workspace:

Answer 1

ls accepts a pattern argument:

group10 <- group40 <- location40 <- test <- NA
mysub <- ls(pattern="^group[0-9]+")
mysub
#[1] "group10" "group40"

You can use lapply to loop over the list of variable names and get their values

groupList <- lapply(mysub, get)

or, in one line

groupList <- lapply(ls(pattern="^group[0-9]+"), get)