Working with categorical data

[kojix2]

YouPlot does not handle category data easily.

YouPlot is a simple command line tool. I don't want to add functionality to YouPlot.
I would like to make more use of other command line tools that can handle categorical data.
The problem is that there is no such tool.

Gnu datamash has the ability to handle categorical data by group by and collapse. However, this is quite inconvenient.

I am looking for ideas to handle categorical data in YouPlot.