The plotinequation
or inequationplot
command plots the region of the plane where given inequalities hold.
plotinequation takes two arguments:
ineqs, a list of inequalities in two variables.
vars, a list of variables var or variables
var=a..b with their ranges of values.
Note that if the ranges are not specified,
Xcas takes the default values of
X-,X+,Y-,Y+ defined in the general graphic configuration
(Cfg ▸ Graphic configuration, see
Section 2.5.8).
plotinequation(ineqs,vars)
draws the points of the plane whose coordinates satisfy the
inequalities ineqs.