ahull_track issue: 'could not find function "psp"'

Question

I've been working with the R library alphahull for a few days now. As I'm trying to get the results as sf polygons, I'm following the recommandation here to use ahull_track, as that returns geom_path objects.

However, when I try it, I run into this issue:

Error in psp(dat[-np, 1], dat[-np, 2], dat[-1, 1], dat[-1, 2], window = owin(range(dat[,  : 
  could not find function "psp"

I did look at the code of function itself on Github, and indeed I see it calls psp on line 8, but without any reference as to which library it shouls be loaded from.

Anyone knows what I missed?

Answer 1

After trying out one by one the different libraries mentioned in the documentation's Import (see below), I found out what I was missing.

It turned out to be spatstat.

Strange that calling require(alphahull) doesn't automatically call require(spatstat).