character_blanks_check
                        Check whether all values are either character
                        strings. Blanks ("") and NA values are not
                        permitted.
character_check         Check whether all values are character strings
                        or blanks (""). NA values are not permitted.
col_check               Check a single column for data fidelity.
dataset                 Demonstration data created to resemble data
                        collected from an educational assessment.
date_check              Check whether all values fall within a date
                        range. NA values are also accepted.
greater_than            Check whether values in column one are greater
                        than their corresponding values in the second
                        column.
greater_than_equalto    Check whether values in column one are greater
                        than or equal to their corresponding values in
                        the second column.
inspectr                inspectr: A package for performing fidelity
                        checks on messy dataframes.
less_than               Check whether values in column one are less
                        than their corresponding values in the second
                        column.
less_than_equalto       Check whether values in column one are less
                        than or equal to their corresponding values in
                        the second column.
numeric_check           Check whether all values are numeric.
three_col_check         Check a column for data fidelity using criteria
                        related to two additional columns.
two_col_check           Check a column for data fidelity using criteria
                        related to a second column.
val_check               Check whether all values in the column fall
                        within a set of user-defined values.
