Recode multiple columns in dataframe R

Question

I am trying to convert a Y into a 1 for a number of columns that could change (e.g. it could go up to x20).

An example of the data is below as well as an expected output.

Data <- tibble(Date = seq.Date(as.Date('2019-01-01'),as.Date('2019-01-08'), by = "day"), 
               x1 = c("Y","","","Y","Y","","Y","Y"),
               x2 = c("","Y","Y","Y","Y","","Y","Y"))


Data_output <- tibble(Date = seq.Date(as.Date('2019-01-01'),as.Date('2019-01-08'), by = "day"), 
               x1 = c(1,0,0,1,1,0,1,1),
               x2 = c(0,1,1,1,1,0,1,1))

NelsonGon · Accepted Answer · 2019-09-26T16:16:14.477

3

With dplyr:

Data %>% 
  mutate_at(vars(contains("x")),~case_when(.=="Y" ~1,
                                           .=="" ~0))

or as suggested by @akrun simply:

Data %>% 
  mutate_at(vars(contains("x")), ~as.integer(.=="Y"))

Result:

# A tibble: 8 x 3
  Date          x1    x2
  <date>     <dbl> <dbl>
1 2019-01-01     1     0
2 2019-01-02     0     1
3 2019-01-03     0     1
4 2019-01-04     1     1
5 2019-01-05     1     1
6 2019-01-06     0     0
7 2019-01-07     1     1
8 2019-01-08     1     1

edited Sep 26 '19 at 16:16

answered Sep 26 '19 at 16:07

NelsonGon

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1

Thanks was trying to do this but was using funs. – Scott Sep 26 '19 at 16:09

score 1 · Answer 2 · answered Sep 26 '19 at 16:15

1

In base R, we can do

Data[-1] <- +( Data[-1] == "Y")

answered Sep 26 '19 at 16:15

akrun

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Recode multiple columns in dataframe R

2 Answers2