Function calculate_frame_abundance_emg

pub fn calculate_frame_abundance_emg(
    time_map: &HashMap<i32, f64>,
    occurrences: &[i32],
    rt: f64,
    sigma: f64,
    lambda_: f64,
    rt_cycle_length: f64,
    n_steps: Option<usize>,
) -> Vec<f64>