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2-d graph

plotfunc(f(x),x) draws the graph of y = f (x) for x in the default interval, plotfunc(f(x),x=a..b) draws the graph of y = f (x) for a $ \leq$ x $ \leq$ b. plotfunc accepts an optional xstep=... argument to specify the discretisation step in x.
Input :
Output :
the graph of y=x^2-2
Input :
Output :
a polygonal line which is a bad representation of y=x^2-2
It is also possible to specify the number of points used for the representation of the function with nstep= instead of xstep=. For example, input :

giac documentation written by Renée De Graeve and Bernard Parisse