How to remove columns in a dataframe in R based on the values from another vector?

There are different options. If we want to remove from the original dataset, assigning to NULL is quick

df1[vecofnames] <- NULL

Another option if we want to subset it to a different object

df2 <- df1[setdiff(names(df1), vecofnames)]

Or with subset

df2 <- subset(df1, select = -vecofnames)

Or in dplyr

library(dplyr)
df2 <- df1 %>%
         select(-vecofnames)