there are 2 octave main binaries with multiple graphic properties
octave command line with full plotting capabilities
octave --gui graphical interface
octave-cli command line inteface with plotting
restricted to fltk and gnuplot
Of the 3 graphics toolkit fltk, gnuplot and qt
fltk is the worst performing on cygwin
gnuplot the lightest
qt the most graphic rich
You need to install with setup the specific forge package
you are looking for.
The update of the global pkg database is managed
by cygwin setup during the postinstall phase.
A semaphore system is in place to update the database only when needed
and just one time, also when multiple forge packages are added or removed.
The GNU Octave language for numerical computations is a (mostly
Matlab (R) compatible) high-level language, primarily intended
for numerical computations. It provides a convenient command-line
interface for solving linear and nonlinear problems numerically.