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A good concise list is provided in the official changelog, here the aim is to be more explicit and sometimes give some examples. Before the respective new gretl version is released, the examples will only work in snapshots that are recent enough, or with self-compiled bleeding-edge versions.

New in what will be gretl 2023c

(this is just a selection, not exhaustive)

gridplot command

This new native command makes it possible to arrange several subplots in a grid (rectangular) layout. As such it will pretty much replace the contributed function package multiplot. There are basically two ways of using it:

First, using some other plotting commands, redirect the output to a string buffer inside a strings array. Then execute the gridplot command on that array. Example:

open australia

strings temparr = array(2)

qqplot IAU --outbuf=temparr[1]

kdplot E --outbuf=temparr[2]

gridplot temparr --output=display

Secondly, use the companion command gpbuild in a block format, and then define the individual parts:

open data4-10

gpbuild MyPlots

 gnuplot ENROLL CATHOL

 gnuplot ENROLL INCOME

 gnuplot ENROLL COLLEGE

end gpbuild

gridplot MyPlots --output=display