[Gnuplot-info] How to plot a discontinous function

[Federico B. <fed...@gm...>]

Hi I'm trying to plot a discontinuous function like this

f(x) = a1*x**2+b1*x+c1  for x in [t11,t12]
f(x) = a2*x**2+b2*x+c2  for x in [t21,t22]
f(x) = a3*x**2+b3*x+c3  for x in [t31,t32]
....
....
...
where t11<=t12<=t21<=t22, etc

and I don't know how to do it.
I've tried defining as many functions as intervals and making the
function undefined (1/0) outside its interval and plotting each
function (with persistent plot) but it doesn't work when the intervals
are small.
Thanks
Federico

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