A Pareto diagram is a chart with the following elements: a tagged histogram of decreasing frequencies and a curve indicating the cumulative frequencies.

Dashed vertical lines indicate the 25%, 50%, and 75% marks.

If the tags parameter is omitted, then Maple assigns consecutive positive integer tags to the elements of the frequency list.

The misc parameter specifies the tag of the frequency list element that represents the miscellaneous data. The miscellaneous data is placed at the end of the sequence of items, so its bar is displayed at the top of the stack of bars.

To get percentages, normalize the frequencies so that they total 100.