On 02/10/16 02:02, Cenk İÇÖZ via R-sig-Geo wrote:
Hi friends,
I have a point pattern that consist of earthquake locations. I want
to test the pattern for complete spatial randomness based on distance
functions. I was using spatstat package allstats function to plot 4
of them together in a graph however I took this error message:
" Error in plot(allstats(dp1)) : error in evaluating the argument
'x' in selecting a method for function 'plot': Error: in Fest(X, r)
the successive r values must be finely spaced: given spacing =
0.010196; required spacing <= 0.00586 "
Is it something related to plotting window properties? Although I got
an error about F function , I could plot it individually. In addition
I could plot all G, F, K and L functions together in a graph
manually. Also I could not find a function to estimate J function in
spatstat package. It is only included in allstat function.
Thanks in advance .
(a) What version of spatstat are you using? It may be out of date. The
version of spatstat currently on CRAN is 1.46-1.
(b) When you say "based on distance functions" I presume that you mean
"based on various distributions of interpoint distances".
(c) I presume that "dp1" is the point pattern (object of class "ppp") of
earthquake locations.
(d) You have not provided a reproducible example of your problem.
Consequently I checked things out with a simulated example:
set.seed(42)
X <- rpoispp(100)
plot(allstats(X))
This ran with no problem, and produced the expected plot.
(e) The function to estimate the J function is Jest(). It has been in
the spatstat package for a very long time.
cheers,
Rolf Turner
--
Technical Editor ANZJS
Department of Statistics
University of Auckland
Phone: +64-9-373-7599 ext. 88276
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