Graphing inequality on a number line?
I can certainly get the solution set for $x^2 - 9 \geq 0$, but how do I get this solution set visualized on a number line?
1 Answer
You can get the characteristic function of the solution set (which is a list of lists of symbolic elements) as follows:
sage: s = solve(x^2 - 9 >= 0, x)
sage: f = lambda t : min(1, sum([bool(i[0](t)) for i in s]))
and then plot it to see the solution set:
sage: plot(f,-10,10)
or even:
sage: plot(f,-10,10, fill='axis')
Your Answer
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Asked: 2014-08-18 22:11:18 +0100
Seen: 604 times
Last updated: Aug 19 '14
1-d plots are not implemented - see http://trac.sagemath.org/ticket/9793