| different_class | Same Class |
| different_dim | Same Dimension |
| different_length | Same Length |
| different_mode | Same Mode |
| different_ncol | Same Number of Rows / Columns |
| different_nrow | Same Number of Rows / Columns |
| different_type | Same Type |
| has_colnames | Has or lacks row/column names? |
| has_dim | Has dimension? |
| has_dimension | Has dimension? |
| has_dimnames | Has or lacks row/column names? |
| has_factors | Has factors? |
| has_Inf | Has missing values, NA, NaN, Inf |
| has_infinite | Has missing values, NA, NaN, Inf |
| has_missing | Has missing values, NA, NaN, Inf |
| has_NA | Has missing values, NA, NaN, Inf |
| has_names | Has or lacks names? |
| has_NaN | Has missing values, NA, NaN, Inf |
| has_nas | Has missing values, NA, NaN, Inf |
| has_not_a_number | Has missing values, NA, NaN, Inf |
| has_rownames | Has or lacks row/column names? |
| is_class | Is class |
| is_dataframe | Is data frame |
| is_decimal | Is decimal |
| is_diagonal | Is diagonal matrix |
| is_even | Is even |
| is_factor_dataframe | Is data frame |
| is_FALSE | If TRUE or FALSE |
| is_false | If TRUE or FALSE |
| is_integer | Is integer |
| is_logical_matrix | Is matrix |
| is_logical_vector | Is vector |
| is_lower_triangular | Is triangular matrix |
| is_matrix | Is matrix |
| is_multiple | Is multiple |
| is_natural | Is natural |
| is_negative | Is negative |
| is_negative_decimal | Is negative decimal |
| is_negative_integer | Is negative integer |
| is_negative_scalar | Is scalar |
| is_not_dataframe | Is data frame |
| is_not_decimal | Is decimal |
| is_not_diagonal | Is diagonal matrix |
| is_not_even | Is even |
| is_not_integer | Is integer |
| is_not_matrix | Is matrix |
| is_not_natural | Is natural |
| is_not_negative | Is negative |
| is_not_odd | Is even |
| is_not_positive | Is positive |
| is_not_scalar | Is scalar |
| is_not_square_matrix | Is square matrix |
| is_not_square_numeric_matrix | Is square numeric matrix |
| is_not_string | Is string |
| is_not_tabular | Is tabular |
| is_not_vector | Is vector |
| is_numeric_dataframe | Is data frame |
| is_numeric_matrix | Is matrix |
| is_numeric_tabular | Is tabular |
| is_numeric_vector | Is vector |
| is_odd | Is even |
| is_one_dim | Test if an object has one-dimension |
| is_positive | Is positive |
| is_positive_decimal | Is positive decimal |
| is_positive_integer | Is positive integer |
| is_positive_scalar | Is scalar |
| is_scalar | Is scalar |
| is_single | Is single |
| is_single_decimal | Is single decimal |
| is_single_even | Is single even |
| is_single_false | Is single false |
| is_single_logical | Is single logical |
| is_single_negative | Is single negative number |
| is_single_negative_decimal | Is single negative decimal |
| is_single_negative_integer | Is single negative integer |
| is_single_number | Is single number |
| is_single_odd | Is single odd |
| is_single_positive | Is single positive number |
| is_single_positive_decimal | Is single positive decimal |
| is_single_positive_integer | Is single positive integer |
| is_single_string | Is single string |
| is_single_true | Is single true |
| is_square_matrix | Is square matrix |
| is_square_numeric_matrix | Is square numeric matrix |
| is_string | Is string |
| is_string_dataframe | Is data frame |
| is_string_matrix | Is matrix |
| is_string_tabular | Is tabular |
| is_string_vector | Is vector |
| is_tabular | Is tabular |
| is_triangular_matrix | Is triangular matrix |
| is_TRUE | If TRUE or FALSE |
| is_true | If TRUE or FALSE |
| is_upper_triangular | Is triangular matrix |
| is_vector | Is vector |
| lacks_colnames | Has or lacks row/column names? |
| lacks_dim | Has dimension? |
| lacks_dimension | Has dimension? |
| lacks_dimnames | Has or lacks row/column names? |
| lacks_names | Has or lacks names? |
| lacks_rownames | Has or lacks row/column names? |
| list_of_logical_vectors | List of vectors |
| list_of_numeric_vectors | List of vectors |
| list_of_string_vectors | List of vectors |
| list_of_vectors | List of vectors |
| list_with_numeric_vectors | List with vectors |
| list_with_string_vectors | List with vectors |
| list_with_vectors | List with vectors |
| same_class | Same Class |
| same_dim | Same Dimension |
| same_length | Same Length |
| same_mode | Same Mode |
| same_ncol | Same Number of Rows / Columns |
| same_nrow | Same Number of Rows / Columns |
| same_type | Same Type |
| true_or_false | If TRUE or FALSE |