Function ncuplot_create 

pub unsafe extern "C" fn ncuplot_create(
    n: *mut ncplane,
    opts: *const ncplot_options,
    miny: u64,
    maxy: u64,
) -> *mut ncuplot

Use the provided plane ‘n’ for plotting according to the options ‘opts’. The plot will make free use of the entirety of the plane. For domain autodiscovery, set miny == maxy == 0. ncuplot holds uint64_ts, while ncdplot holds doubles.