I was trying to recode using mutate and recode

tidyverse
#1

I tried to recode using mutate and recode. I am new to this. and stuggling. Plaese help

DM_data %>% mutate(Sex= recode(Sex, "a" = "M", "b" = "F"))

Error message came as

Error in UseMethod("mutate_") :
no applicable method for 'mutate_' applied to an object of class "NULL"

#2

The error message is telling you that DM_data contains nothing and it should be a data frame, you should start by checking on that.

If you need more specific help, please provide a proper REPRoducible EXample (reprex) illustrating your issue.

#3

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