CODEWITHSUNDEEP
r
J. Lee
J. Lee

Reputation: 47

How to create a dummy variable in R with multiple conditions using ifelse() command

I am trying to create a dummy variable in R where the categorical variable "position" equals 1 for 'first base' or 'second base'. I know how to do this with only one like 'first base' but I'm not sure how to do it including second base as option. How would I write this code?

baseball$POS <- ifelse(baseballdf$position == "first base", 1, 0)

Upvotes: 0

Views: 1632

Answers (1)

akrun
akrun

Reputation: 887213

We can use %in% instead of == if we are matching multiple elements and also, ifelse is not needed as TRUE/FALSE can be coerced to 1/0 with as.integer or +

as.integer(baseballdf$position %in% c("first base", "second base"))

Upvotes: 1

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