mirror of
https://github.com/qgis/QGIS.git
synced 2025-03-09 00:35:20 -05:00
27 lines
1.4 KiB
Plaintext
27 lines
1.4 KiB
Plaintext
(dp0
|
|
S'ALG_DESC'
|
|
p1
|
|
VThis R script computes simulation envelopes of the G(r) - nearest neighbour distance distribution function.\u000a\u000aThe nearest neighbour distance distribution function (also called the \u201cevent-to-event\u201d or \u201cinter-event\u201d distribution) of a point process X is the cumulative distribution function G of the distance from a typical random point of X to the nearest other point of X. An estimate of G derived from a spatial point pattern dataset can be used in exploratory data analysis and formal inference about the pattern. In exploratory analyses, the estimate of G is a useful statistic summarising one aspect of the \u201cclustering\u201d of points. For inferential purposes, the estimate of G is usually compared to the true value of G for a completely random (Poisson) point process, which is where lambda is the intensity (expected number of points per unit area). Deviations between the empirical and theoretical G curves may suggest spatial clustering or spatial regularity.\u000a\u000aR dependencies: library "maptools" and "spatstat"
|
|
p2
|
|
sS'ALG_CREATOR'
|
|
p3
|
|
VVictor Olaya, volayaf(at)gmail.com
|
|
p4
|
|
sS'Layer'
|
|
p5
|
|
VA point pattern process.
|
|
p6
|
|
sS'Nsim'
|
|
p7
|
|
VNumber of simulated point patterns to be generated when computing the envelopes.
|
|
p8
|
|
sS'RPLOTS'
|
|
p9
|
|
VPlot with the simulation envelopes.
|
|
p10
|
|
sS'ALG_HELP_CREATOR'
|
|
p11
|
|
VFilipe S. Dias, filipesdias(at)gmail.com
|
|
p12
|
|
s.
|