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All of Octave's plotting functions use gnuplot to handle the
actual graphics. Most types of plots can be generated using the basic
plotting functions, which are patterned after the equivalent functions
in Matlab. The use of these functions is generally
straightforward, and is the preferred method for generating plots.
However, for users familiar with gnuplot, or for some
specialized applications where the basic commands are inadequate,
Octave also provides two low-level functions, gplot and
gsplot, that behave almost exactly like the corresponding
gnuplot functions plot and splot. Also note that
some advanced Matlab features from recent versions are not
implemented, such as handle-graphics and related functions.