View source: R/ArcSliceFunctions.R
inci.matAStri | R Documentation |
Returns the incidence matrix for the AS-PCD whose vertices are the given 2D numerical data set, Xp
.
AS proximity regions are defined with respect to the triangle tri
=T(v=1,v=2,v=3)
and
vertex regions based on the center M="CC"
for circumcenter of tri
;
or M=(m_1,m_2)
in Cartesian coordinates or M=(\alpha,\beta,\gamma)
in barycentric coordinates in the
interior of the triangle tri
; default is M="CC"
i.e., circumcenter of tri
.
Loops are allowed, so the diagonal entries are all equal to 1.
See also (\insertCiteceyhan:Phd-thesis,ceyhan:comp-geo-2010,ceyhan:mcap2012;textualpcds).
inci.matAStri(Xp, tri, M = "CC")
Xp |
A set of 2D points which constitute the vertices of AS-PCD. |
tri |
Three 2D points, stacked row-wise, each row representing a vertex of the triangle. |
M |
The center of the triangle. |
Incidence matrix for the AS-PCD whose vertices are 2D data set, Xp
,
and AS proximity regions are defined with respect to the triangle tri
and
vertex regions based on circumcenter.
Elvan Ceyhan
inci.matAS
, inci.matPEtri
, and inci.matCStri
## Not run:
A<-c(1,1); B<-c(2,0); C<-c(1.5,2);
Tr<-rbind(A,B,C);
n<-10
set.seed(1)
Xp<-runif.tri(n,Tr)$g
M<-as.numeric(runif.tri(1,Tr)$g) #try also M<-c(1.6,1.2)
IM<-IncMatAStri(Xp,Tr,M)
IM
dom.num.greedy(IM)
dom.num.exact(IM)
## End(Not run)
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