# assertive.types v0.0-3

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## Assertions to Check Types of Variables

A set of predicates and assertions for checking the types of variables. This is mainly for use by other package developers who want to include run-time testing features in their own packages. End-users will usually want to use assertive directly.

# assertive.types

A set of predicates and assertions for checking the types of variables. Most of the documentation is on the assertive page. End-users will usually want to use assertive directly.

### Installation

To install the stable version, type:

install.packages("assertive.types")


To install the development version, you first need the devtools package.

install.packages("devtools")


Then you can install the assertive.types package using

library(devtools)
install_bitbucket("richierocks/assertive.types")


### Predicates

All the predicates in this package check for objects of specific types.

Wrappers to functions in base:

is_array, is_call, is_character, is_complex, is_data.frame, is_environment, is_expression, is_factor, is_function, is_integer, is_language, is_list, is_logical, is_matrix, is_name/is_symbol, is_numeric, is_ordered, is_primitive, is_qr, is_raw, is_s4, and is_table.

Wrappers to functions in grDevices:

is_raster.

Wrappers to functions in methods:

is_class.

Wrappers to functions in stats:

is_leaf, is_mts, is_stepfun, is_ts, is_tskernel.

Wrappers to functions in utils:

is_relistable.

### Assertions

Predicates that return a vector have two corresponding assertions. For example, is_class has assert_all_are_classes and assert_any_are_classes.

Predicates returning a single logical value have one corresponding assertion. For example, is_array has assert_is_array.

## Functions in assertive.types

 Name Description assert_is_array Is the input an array or matrix? assert_is_a_string Is the input of type character? assert_is_data.frame Is the input is a data.frame? assert_is_closure_function Is the input a closure, builtin or special function? assert_is_a_complex Is the input complex? assert_is_environment Is the input an environment? assert_is_data.table Is the input a data.table? assert_all_are_classes Is the input the name of a (formally defined) class? assert_is_all_of Does x belong to these classes? assert_is_date Is the input a date? assert_is_formula Is the input a formula? assert_is_function Is the input a function? assert_is_leaf Is the input a (dendrogram) leaf? assert_is_list Is the input a list? assert_is_internal_function Is the input an internal function? assert_is_factor Is the input a factor? assert_is_externalptr Is the input is an external pointer? assert_is_call Is the input a language object? assert_is_inherited_from Does the object inherit from some class? assert_is_an_integer Is the input an integer? assert_is_a_bool Is the input logical? assert_is_try_error Is the input a condition? assert_is_mts Is the input a time series? assert_is_a_double Is the input numeric? assert_is_tbl Is the input a tbl? assert_is_table Is the input a table? assert_is_S4 Is the input an S4 object? assert_is_s3_generic Is the input an S3 generic or method? assert_is_a_raw Is the input raw? assert_is_relistable Is the input relistable? assert_is_raster Is the input a raster? assert_is_qr Is the input a QR decomposition of a matrix? No Results!