function that outputs a data frame in R

Question

I have an example data frame named

df

:

    Store    Cash Only 

1    "A"      Y

2    "B"      N

3    "C"      N

4    "D"      Y

I would like to create a function that allows a user to see whether or not a store is "cash only". Ideally, the function would output only the stores that have a

Y

in the

Cash Only

column. The output should look like this:

  Store    Cash Only 

1    "A"      Y

2    "D"      Y

Does anyone know how I would go about this? Thanks!

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Answer 1

you just need to write a function that returns a subset of the input dataframe where cash == "Y":

df = data.frame(store=c("a","b","c","d"), cash=c("Y","N","N","Y"))

cash_only <- function(df){
  return(subset(df, cash == "Y"))
}

new_df <- cash_only(df)

function that outputs a data frame in R

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