collapse_pop_state | R Documentation |
Given a model object, this function computes population sizes given thresholds for a state variable of interest. For example, the number (or proportion) of individuals shorter than 60 cm tall at the 20th time step of the model.
collapse_pop_state(ipm, time_step, ...)
ipm |
An object created by |
time_step |
the time step to pull out. Can be a single time step or a vector of multiple time steps. In the latter case, one value is computed for each time step. |
... |
Named expressions that provide the threshold information for the desired classes. The expression should be logicals with a state variable name on the left side, and a threshold value on the right side. |
A named list of numeric vectors containing the summed population
sizes at each requested time step. Names are taken from ...
.
data(gen_di_det_ex) # Rebuild the model and return_main_env this time gen_di_det_ex <- gen_di_det_ex$proto_ipm %>% make_ipm(iterate = TRUE, iterations = 50, return_main_env = TRUE) disc_sizes <- collapse_pop_state(gen_di_det_ex, time_step = 20:25, seedlings = ht <= 10, NRA = ht > 10 & ht <= 200, RA = ht > 200)
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