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Lest provides two functions for vectorised conditional recoding of
variables. case_when() enables you to vectorise multiple
if and else statements (like
CASE WHEN in SQL). if_else() is a stricter and
more predictable version of base::ifelse() that preserves
attributes (and therefore works with Dates). The functions in lest are
forks of the dplyr functions of
the same name. For more infos please refer to the documentation.
Use this package if you like the semantics of
dplyr::case_when(), but do not want to use dplyr because of
the dependencies it comes with. If you already use dplyr in your
project, you gain no advantage from lest.
lest::case_when() and lest::if_else() behave
exactly identical to the dplyr equivalents, just that they do not
support tidyeval syntax (like !!!).
lest depends only on base R, and will never add any external dependencies.
You can install lest from GitHub with:
# install.packages("devtools")
devtools::install_github("s-fleck/lest")x <- 1:50
case_when(
x %% 35 == 0 ~ "fizz buzz",
x %% 5 == 0 ~ "fizz",
x %% 7 == 0 ~ "buzz",
TRUE ~ as.character(x)
)
case_when(
x %% 35 == 0 ~ 35,
x %% 5 == 0 ~ 5,
x %% 7 == 0 ~ 7,
TRUE ~ NA
)These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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