Message-ID: <AANLkTi=4e5n+yi=Pg1ELhv0U7PMq1D5u=xZ=sbFnfxXc@mail.gmail.com>
Date: 2010-09-24T08:25:59Z
From: caspar hallmann
Subject: Question of ppm warnings of print.ppm
Dear list,
I am attempting to fit an inhomogeneous poisson point process to some
point pattern data, using ppm from spatstat (v 1.17-5). I have been
found guilty of having NA values in my covariate-images(a categorical
variable), and have thus been receiving a lot of warnings. Having
fitted my model and in attempt to print a summary (or the ppm model)
my screen is cluttered with
..$ na.covariates:List of 3
.. ..$ covnames.na : chr "habitat"
.. ..$ quadpoints.na: logi [1:4219, 1] FALSE FALSE FALSE FALSE FALSE FALSE ...
.. ..$ print : chr "Values of the covariate ?habitat? were NA
or undefined at 7.8% (327 out of 4219) of the quadrature points"
replicated uncountable times, and not allowing me to see any of the
useful results.
I think I can get around it, but I just wonder if this is the intended
behaviour of print.ppm and print.summary.ppm.
Thanks in advance
Caspar