studpermu.test.pp3 | R Documentation |
Perform a studentised permutation test for a difference between groups of point patterns
## S3 method for class 'pp3' studpermu.test( X, formula, summaryfunction = K3est, ..., nperm = 999, use.Tbar = FALSE, rinterval = NULL, minpoints = 20, rmax = NULL, nrval = 128 )
X |
A hyperframe containing at least the point patterns and groups |
formula |
Formula describing the grouping. The left side of the formula
identifies which column of |
summaryfunction |
Summary function applicable to pp3. Defaults to
|
... |
Additional arguments passed to |
nperm |
Number of random permutations for the test; defaults to 999 |
use.Tbar |
Logical value indicating choice of test statistic. If TRUE, use the alternative test statistic, which is appropriate for summary functions with roughly constant variance, such as K(r)/r or L(r). Defaults to FALSE |
rinterval |
Numeric of length 2. Experimental |
minpoints |
Minimum permissible number of points in a point pattern for inclusion in the test calculation |
This function performs the studentized permutation test of Hahn (2012) for a difference between groups of point patterns.
A group needs to contain at least two point patterns with at least
minpoints
points in each pattern.
The function returns an object of class "htest
" and "studpermutest
" that
can be printed and plotted. The printout shows the test result and p-value.
The plot shows the summary functions for the groups (and the group means if
requested).
An object of class "studpermutest
".
Hahn, U. (2012) A studentized permutation test for the comparison of spatial point patterns. Journal of the American Statistical Association 107 (498), 754-764.
studpermu.test
,
link[spatstat.core]{plot.studpermutest}
Other spatstat extensions:
G3cross()
,
G3multi()
,
K3scaled()
,
Tstat.pp3()
,
bdist.points()
,
marktable.pp3()
,
marktable()
,
quadratcount.pp3()
,
quadrats.pp3()
,
rPoissonCluster3()
,
rjitter.pp3()
,
rjitter.ppp()
,
rjitter()
,
rpoint3()
,
sample.pp3()
,
sample.ppp()
,
shift.pp3()
,
studpermu.test()
,
superimpose.pp3()
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