Fresnel_s
Definition:
/math-1d81f27f49b22c93eb29c620f6b9fe47.png "S = fresnel\_s(x)")
evaluates an approximation to the Fresnel Integral
/math-a0dee6a5e50c22f6c21ddc86392b6a0e.png "S(x)=\int_0^x\sin (\frac \pi 2t^2)dt")
The function is based on Chebyshev expansions.
For more information please review the s20acc function in the NAG document.
Parameters:
- x (input, double)
- The argument x of the function.
- s (output, double)
- Approximation of the Fresnel Integral.