R: subsetting data frame by both certain column names (as a variable) and field values

Question

I have list of names and I have a data frame with colnames that match sometimes the names in the list. Now I want to subset the data frame based on two criteria: the colnames (a

Answer 1

Use the old-fashioned [ and [[ operators:

name <- "name1"
df[df[[name]] > 1.5, ]
(etc)