What is gretl?
Gretl is an open-source statistical package that is mainly used for econometrics. The name is an acronym for Gnu Regression, Econometrics, and Time-series Library. It also has a graphical user interface and can be used together with X-12-Arima, TRAMO/SEATS, R, Octave, and Ox. It is written in C, uses GTK as a widget toolkit for creating its GUI, and also uses gnuplot for generating graphs. As a complement to the GUI, it also has a command line interface. Gretl can output models a la LaTex file. System requirements include Windows XP or higher, and a processor that supports the SSE2 instruction set.
Aside from English, Gretl is also available in Greek, Chinese, Czech, German, French, Italian, Polish, Russian, Spanish, Portuguese, and Turkish. Gretl has also been reviewed several times in the Journal of Applied Econometrics, as well as the Journal of Statistical Software. Gretl offers its own, fully-documented XML-based data format. It can also import ASCII, Comma Separated Values, databank, EViews, PC Give, RATS4, and Strata files. Gretl can export to GNU Octave, R, and JMulTi file formats.
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