On 01/04/18 09:36, ASANTOS via R-sig-Geo wrote:
Dear R Sig Geo Members,
I've like to know if there are any function in any package for
estimation density in a marked point process (e.g. geographic position
and size of ants nests in square meters). My goal will be represents the
density of ants nest estimated, but use nests sizes as covariate, this
is possible?
The Smooth.ppp() function in the spatstat package might be what you are
looking for.
Using nest sizes as a *covariate* does not make sense to me. A
covariate should be defined at all points of the observation window, not
just at the points of the observed pattern.
See
Adrian Baddeley, Ege Rubak, Rolf Turner (2015). Spatial Point
Patterns: Methodology and Applications with R. London: Chapman and
Hall/CRC Press, 2015. URL
http://www.crcpress.com/Spatial-Point-Patterns-Methodology-and-Applications-with-R/Baddeley-Rubak-Turner/9781482210200/
particularly section 5.6.4, pages 147, 148.
cheers,
Rolf Turner
--
Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276
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