locations.inside {geoR} | R Documentation |
Selects the prediction locations located inside a polygon defining
borders of a region where prediction is aimed.
Typically internally called by geoR functions
krige.bayes
, krige.conv
, ksline
.
locations.inside(locations, borders, as.is = TRUE, ...)
locations |
a two columns matrix or dqata frame with coordinates of the prediction locations. |
borders |
a two column matrix or data-frame with coordinates of a polygon defining the borders of the region. |
as.is |
logical defining if the returned object of of the same
type (list, data-frame or matrix) as the provided in
locations . If FALSE the function returns a matrix. |
... |
arguments to be passed to the splancs function
pip |
This function works basically as a wrapper for splancs functions
pip
which in turn uses
inout
.
A two columns matrix, data-frame or a list with 2 elements with coordinates of points inside the borders.
if(require(splancs)){ data(parana) gr <- expand.grid(seq(150, 800, by=20), seq(70, 500, by=20)) plot(gr, asp=1, pch="+") polygon(parana$borders) gr.in <- locations.inside(gr, parana$borders) points(gr.in, col=2, pch="+") }