grapher is a a fork of @holman's spark that allows you to plot things in the terminal.
epm install-pkg grapher.py
Download grapher.py and place it in ~/.ergo/packages/..
The grapher package provides the graph command, which accepts a series of numbers and graphs them with special unicode block characters, like so:
$ graph 1 5 92 84 33 ▁▁█▃▅