Hello R users,
I am fitting spatial point process models in spatstat using ppm and my models
actually contain spatial covariates. The results of the models are returned
with some levels of the covariates absent. eg when I fit a model with
"aspect"
using:
ppm(points, ~aspect, covariates=list(aspect=aspect))
the results give coefficients for "North"," South",
"East",... but there is no
coefficient for "West". Does this mean West has zero effect?
Regards,
--------
Mike Chi Jiang.
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