Replace values in vector where not %in% vector

Question

Short question:

I can substitute certain variable values like this:

values <- c(\"a\", \"b\", \"a\", \"b\", \"c\", \"a\", \"b\")
df <- data.frame(v         


        

Answer 1

What about:

df[!df[, 1] %in% c("a", "b"), ] <- "x"

  values
1      a
2      b
3      a
4      b
5      x
6      a
7      b

Answer 2

Your example is a bit unclear and not reproducible. However, based on guessing what you actually want, I could suggest trying this option using the data.table package:

df[values %in% c("a", "b"), values := "x"]

or the dplyr package:

df %>% mutate(values = ifelse(values %in% c("a","b"), x, values))