Function diric 

pub fn diric(n: u32, x: f64) -> f64

Dirichlet kernel, also known as the periodic sinc function.

It is defined as

D_n(x) = sin(n x/2) / (n sin(x/2))

for n > 0.

Corresponds to scipy.special.diric in SciPy.

Note: The argument order in this crate is (n, x), whereas SciPy uses (x, n).

Panics

• Panics if n is zero.