631.sagews

#simple example to show how to graph splines
x = var('x');
f1(x) = x^2
f2(x) = -x^2
f3(x) = 1-2*x
p1 = plot(f1,-1,0)
p2 = plot(f2,0,1,rgbcolor=(1,0,0))
p3 = plot(f3,1,2,rgbcolor=(0,1,0))

(p1+p2+p3).show()