Change Certain Value in Data Frame to Different Values in R (Example)

my_df <- data.frame(x = c("a", "a", "a", "b", "b", "b"),      # Create example data
                    y = c("a", "b", "a", "b", "a", "b"),
                    stringsAsFactors = FALSE)
my_df                                                         # Return data to console
#   x y
# 1 a a
# 2 a b
# 3 a a
# 4 b b
# 5 b a
# 6 b b

my_df <- data.frame(x = c("a", "a", "a", "b", "b", "b"), # Create example data y = c("a", "b", "a", "b", "a", "b"), stringsAsFactors = FALSE) my_df # Return data to console # x y # 1 a a # 2 a b # 3 a a # 4 b b # 5 b a # 6 b b

my_df[my_df == "a"] <- "new"                                  # Replace values
my_df                                                         # Return data to console
#     x   y
# 1 new new
# 2 new   b
# 3 new new
# 4   b   b
# 5   b new
# 6   b   b

my_df[my_df == "a"] <- "new" # Replace values my_df # Return data to console # x y # 1 new new # 2 new b # 3 new new # 4 b b # 5 b new # 6 b b