Function symbols 

pub fn symbols(
    c: &Constellation,
    n: usize,
    px: Option<&[f64]>,
    rng: &mut Rng,
) -> Result<(Vec<usize>, Vec<C64>)>

n random symbols of c drawn with the probabilities px (uniform if None, normalised to a sum of 1 otherwise, as Constellation::priors).

Returns the indices (Gray labels) and the symbols.

Errors

As Constellation::priors.