gretl is an
open-source
Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use the source code, design documents, or content of the product. The open-source model is a decentralized sof ...
statistical package
Statistical software are specialized computer programs for analysis in statistics and econometrics.
Open-source
* ADaMSoft – a generalized statistical software with data mining algorithms and methods for data management
* ADMB – a software ...
, mainly for
econometrics
Econometrics is the application of Statistics, statistical methods to economic data in order to give Empirical evidence, empirical content to economic relationships.M. Hashem Pesaran (1987). "Econometrics," ''The New Palgrave: A Dictionary of ...
. The name is an acronym for
''G''nu ''R''egression, ''E''conometrics and
''T''ime-series ''L''ibrary.
It has both a
graphical user interface
The GUI ( "UI" by itself is still usually pronounced . or ), graphical user interface, is a form of user interface that allows users to interact with electronic devices through graphical icons and audio indicator such as primary notation, inste ...
(GUI) and a
command-line interface
A command-line interpreter or command-line processor uses a command-line interface (CLI) to receive commands from a user in the form of lines of text. This provides a means of setting parameters for the environment, invoking executables and pro ...
. It is written in
C, uses
GTK+
GTK (formerly GIMP ToolKit and GTK+) is a free and open-source cross-platform widget toolkit for creating graphical user interfaces (GUIs). It is licensed under the terms of the GNU Lesser General Public License, allowing both free and proprie ...
as
widget toolkit for creating its GUI, and calls
gnuplot
gnuplot is a command-line and GUI program that can generate two- and three-dimensional plots of functions, data, and data fits. The program runs on all major computers and operating systems (Linux, Unix, Microsoft Windows, macOS, FreeDOS, an ...
for generating graphs. The native scripting language of gretl is known as hansl (see below); it can also be used together with
TRAMO/SEATS,