I need to define a function, which has very different behaviour in different regions. There are about 13 different regions. A sample of my function is the foloowing table:
I want to define it as a function of
x, and I demand that for example for
f[x_]:=13.088-8.84*x^2, and for
f[x_]:=12.58-1.26*x-3.64*x^2-5.53*x^3 and .... .
How can I do it in a wise way in