plot_time_series: Plot code frequency for a datavyu column
In tca2/datavyu: Prepare and Create Output from datavyu Coding Files

Plot code frequency for a datavyu column

plot_time_series(
  columns,
  directory = NULL,
  colors = 1,
  cat_order = NULL,
  color_scale = NULL
)

`columns`	the column or columns to select as character string or vector
`directory`	path to where csv files are to be found with `datavyur::import_datavyu()`
`colors`	color palette to use, options from `ggplot2::scale_color_brewer()` function
`cat_order`	character vector of the order in which to display codes in plot
`color_scale`	a named character vector manually specifying a color scale will also reorder based on order provided