How do I select variables in an R dataframe whose names contain a particular string?

Question

Two examples would be very helpful for me.

How would I select: 1) variables whose names start with b or B (i.e. case-insensitive) or 2) variables whose names contain

Answer 1

I thought it was worth adding that select_vars is retired as of tidyverse version 1.2.1. Now, tidyselect::vars_select() is likely what you're looking for within the "tidyverse". See the documentation here.