How can I select columns of a data.table based on a regex?
Consider a simple example as follows:
library(data.table) mydt <- data.table(foo=c(1,2), bar=c(2,3), baz=c(3,4))
Is there a way to use columns of
baz from the datatable based on a regex? I know that the following solution works but if the table is much bigger and I would like to choose more variables this could easily get cumbersome.
mydt[, .(bar, baz)]
I would like to have something like
dplyr::select() but only by reference.