freq_table: Frequency Table
In jinlow/report.tools: Tools to help create analytic reports

freq_table creates a simple frequency table of one or more columns.

1 2	freq_table(x, ..., cut_fmt = NULL, na_last = FALSE, decreasing = FALSE)

`x`	a `data.frame` or `data.table` object.
`...`	The columns to use to create the frequency table, all combinations of the unique levels of the columns will be used to create the rows of the frequenct table.
`cut_fmt`	a function used to cut a numeric column into descrete levels to use in the table. This parameters currently only supports a single numeric column. Default is set to `NULL`. `cut_fmt` supports the following predefined functions: Set `cut_fmt = "decile"` to cut the numeric column into decile breaks. Set `cut_fmt = "quantile"` to cut the numneric column into quantile breaks.
`na_last`	set to `TRUE` to have any `NA` values that may be present in the provided columns to be placed in the last row of the frequency table. Default is set to `FALSE`.
`decreasing`	if set to `TRUE` the unique levels of the columns will be presented in a decreasing order. Default is set to `FALSE`.