params: Parameters for chk functions

In chk: Check User-Supplied Function Arguments

Parameters for chk functions

Description

Descriptions of the parameters and return values for the chk functions

Arguments

x	The object to check.
x_name	A string of the name of object x or NULL.
y	An object to check against.
chk	A flag specifying whether to check the other parameters.
chk_fun	A chk_ function.
tolerance	A non-negative numeric scalar.
ext	A character vector of the permitted file extensions (without the .).
exists	A flag specifying whether the files/directories must (or must not) exist.
value	A non-missing scalar of a value.
range	A non-missing sorted vector of length 2 of the lower and upper permitted values.
inclusive	A flag specifying whether the range is exclusive.
regexp	A string of a regular expression.
values	A vector of the permitted values.
class	A string specifying the class.
length	A count of the length.
upper	A count of the max length.
formals	A count of the number of formal arguments.
incomparables	A vector of values that cannot be compared. FALSE means that all values can be compared.
by	A character vector specifying the column names to join x and y on. If named the names are the corresponding columns in x.
exclusive	A flag specifying whether x must only include columns named in values.
order	A flag specifying whether the order of columns in x must match names in values.
nrow	A flag or a whole numeric vector of the value, value range or possible values.
key	A character vector of the columns that represent a unique key.
vld_fun	A vld_ function.
...	Additional arguments.

Value

The chk_ function throws an informative error if the test fails or returns the original object if successful so it can used in pipes.

The vld_ function returns a flag indicating whether the test was met.

chk documentation built on Oct. 6, 2023, 9:06 a.m.