I’d seen my father. He was a poor man, and I watched him do astonishing things. - Sidney Poitier
poorman
is a grammar of data manipulation, providing dependency free versions of dplyr
verbs that help you solve the most common data manipulation challenges:
select()
picks variables based on their names.mutate()
adds new variables that are functions of existing variables.filter()
picks cases based on their values.summarise()
reduces multiple values down to a single summary.arrange()
changes the ordering of the rows.poorman
attempts to replicate the dplyr
API exactly such that your dplyr
code will still run even if you use poorman
in its place. In addition to replicating dplyr
functionality, poorman
implements other functionality from the wider tidyverse
such as select helpers and the pipe, %>%
.
For more details on the functionality available within poorman
, check out the poorman
series of blog posts here.
You can install the development version from GitHub with:
Or you can install the latest release from CRAN with:
If you’d like to try out the latest version of the package on CRAN using Docker, you can run the latest image with:
library(poorman, warn.conflicts = FALSE)
#
# I'd seen my father. He was a poor man, and I watched him do astonishing things.
# - Sidney Poitier
mtcars %>%
select(mpg, starts_with("c")) %>%
mutate(mpg2 = mpg * 2, mpg4 = mpg2 * 2) %>%
filter(mpg > 28)
# mpg cyl carb mpg2 mpg4
# Fiat 128 32.4 4 1 64.8 129.6
# Honda Civic 30.4 4 2 60.8 121.6
# Toyota Corolla 33.9 4 1 67.8 135.6
# Lotus Europa 30.4 4 2 60.8 121.6
mtcars %>%
group_by(am, cyl) %>%
summarise(meanMpg = mean(mpg), sumMpg = sum(mpg)) %>%
ungroup()
# am cyl meanMpg sumMpg
# 1 0 4 22.90000 68.7
# 2 0 6 19.12500 76.5
# 3 0 8 15.05000 180.6
# 4 1 4 28.07500 224.6
# 5 1 6 20.56667 61.7
# 6 1 8 15.40000 30.8