seg rate gen from upper/lower bounds
sed_rate_gen_from_bounds(h_l, s_l, h_u, s_u, rate = 1)a function factory for usage with sedrate_to_multiadm
height values for lower bounds
sed rate values for lower bounds
height values for upper bounds
sed rate values for upper bounds
rate of poisson point process
sedrate_to_multiadm() for estimating age-depth models using the outputs, sed_rate_from_matrix() for other means of defining sedimentation rates