Plotting points showing estimated detection prob appears wrong for point transect analyses with adjustments

[lenthomas]

In the following analysis there are no covariates, so I would expect the points to sit exactly on the detection function line. Therefore either the line or the points are wrong. The same thing happens for other key functions if there are adjustment terms.

DuikerCameraTraps <- read.csv(file="https://datadryad.org/stash/downloads/file_stream/73221", 
                              header=TRUE, sep="\t")

library(Distance)
conversion <- convert_units("meter", NULL, "square kilometer")
trunc.list <- list(left=2, right=15)
mybreaks <- c(seq(2, 8, 1), 10, 12, 15)

uni1 <- ds(DuikerCameraTraps, transect = "point", key="unif", adjustment = "cos",
           nadj=1,
           cutpoints = mybreaks, truncation = trunc.list)

plot(uni1, showpoints = TRUE)

[dill]

Looking at other datasets, this seems to be an issue with left truncation, rather than just point transects with adjustments.

[dill]

closed via 451badf