In git and snapshots there's a new GUI convenience: point-and-click
construction of 100-based indices of selected time series.
It's not rocket science to construct such series via scripting or
console, but I wanted this for classroom use -- when using gretl for
displaying data in a macroeconomics class, for example.
Case in point: From a blank slate, open the fedstl database and
import the series nicur (National Income), wascur (Wages and
Salaries) and cpatax (Corporate profits after tax). Set the sample
range to start in 2000:1. Swipe across the 3 series, right click,
and choose "Add index values". Then swipe across the three newly
created "i_*" index series, right click and do "Time series plot"
(on a single graph).
You can immediately see why US corporations are in great need of a
tax cut... not!
Allin