stop_if_not function

A specialized version of stopifnot() for pointblank : stop_if_not()

This variation of stopifnot() works well as a standalone replacement for stopifnot() but is also customized for use in validation checks in R Markdown documents where pointblank is loaded and validate_rmd() is invoked. Using stop_if_not() in a code chunk where the validate = TRUE

option is set will yield the correct reporting of successes and failures whereas stopifnot() does not.

stop_if_not(...)

Arguments

• ...: R expressions that should each evaluate to (a logical vector of all) TRUE.

Returns

NULL if all statements in ... are TRUE.

Function ID

13-5

Examples

# This checks whether the number of
# rows in `small_table` is greater
# than `10`
stop_if_not(nrow(small_table) > 10)

# This will stop for sure: there
# isn't a `time` column in `small_table`
# (but there are the `date_time` and
# `date` columns)
# stop_if_not("time" %in% colnames(small_table))

# You're not bound to using tabular
# data here, any statements that
# evaluate to logical vectors will work
stop_if_not(1 < 20:25 - 18)

See Also

Other Utility and Helper Functions: affix_date(), affix_datetime(), col_schema(), from_github(), has_columns()