Chebyshev PDF
y=chebyshev_pdf(x)
a matrix of doubles
a matrix of doubles, the probability density
Computes the Chebyshev probability distribution function:
for any real value x. Its integral is equal to 1.
x=linspace(-0.99,0.99,1000); y=chebyshev_pdf(x); scf(); plot(x,y) xtitle("Chebyshev PDF","x","f(x)")