Function gsl_sys::gsl_stats_ulong_spearman

pub unsafe extern "C" fn gsl_stats_ulong_spearman(
    data1: *const c_ulong, 
    stride1: usize, 
    data2: *const c_ulong, 
    stride2: usize, 
    n: usize, 
    work: *mut f64
) -> f64