The CHEBY(x,x0,a0,…,an) function returns the value of an nth order Chebyshev polynomial of the first kind. You can define up to a 30th order polynomial.
Arguments
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x
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The independent variable. You can enter a valid expression for the independent variable such as 2*TIME.
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x0
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The constant offset of the independent variable.
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a0,…,an
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A set of polynomial coefficients.
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Function Definition
CHEBY(x,x0,a0,…,an) =
a0 + Σj=1 … n aj*Tj(x-x0)
where
T1(x-x0) = x-x0
Tj(x-x0) = 2*(x-x0)*Tj-1(x-x0)*Tj-2(x-x0)