For models with covariates the detection probability for each observation can vary. This function computes an average value for a set of distances to plot an average line to graphically represent the fitted model in plots that compare histograms and the scatter of individual estimated detection probabilities. Averages are calculated over the observed covariate combinations.
average.line(finebr, obs, model)list with 2 elements
xgrid | vector of gridded distance values |
values | vector of average detection function values at
the xgrid values |
set of fine breaks in distance over which detection function values are averaged and plotted
value of observer for averaging (1-2 individual observers; 3 duplicates; 4 pooled observation team)
ddf model object
Jeff Laake