Examples of new `dplyr` and `purrr` functionality

functional_programming_examples.R

library(tibble)
library(dplyr)

## sample data
df <- frame_data(
    ~x, ~y,  ~z, ~x1, ~x2, ~x3, ~y1, ~y2, ~y99, ~z99, ~zz,
    99, 2,  3.6, 99, 2,  3.6, 99, 2,  3.6, 99, 2,
    99, 2,  3.6, 99, 2,  3.6, 99, 2,  3.6, 99, 2,
    99, 2,  3.6, 99, 2,  3.6, 99, 2,  3.6, 99, 2
)


## Example: divide each column by 100
df %>% mutate_all(funs("div_by_100" = . / 100)) %>% glimpse

## Example: subtract one column from all others
df %>% mutate_all(funs("minus_x" = . - x)) %>% glimpse

## More coming soon

Reference docs:

• https://blog.rstudio.org/2016/06/27/dplyr-0-5-0/
• https://blog.rstudio.org/2016/01/06/purrr-0-2-0/
• http://lionel-.github.io/2015/10/08/using-purrr-with-dplyr/