This function facilitates the generation of a 2D prediction grid for geostatistical kriging.
pred_grid(coords, y.coords = NULL, …, y.by = NULL,
y.length.out = NULL, y.along.with = NULL)
a list, matrix or data-frame with xy-coordinates of prediction points or a vector with x-coordinates.
a vector with y-coordinates. Needed if
argument coords
provides only x-coordinates.
arguments by
or length.out
to be passed to the function rep
.
These arguments are used for the x-coordinates and are
default optioons for y-coordinates.
Optional. by
argument for rep
to be
used with the y-coordinates.
Optional. length.out
argument for
rep
to be used with the y-coordinates.
Optional. along.with
argument for rep
to be
used with the y-coordinates.
An two column data-frame which is on output of expand.grid
.
See seq
and expand.grid
which are
used internally and locations.inside
and
polygrid
to select points inside a border.
# NOT RUN {
pred_grid(c(0,1), c(0,1), by=0.25) ## create a grid in a unit square
loc0 <- pred_grid(ca20$borders, by=20)
points(ca20)
points(loc0, pch="+")
points(locations.inside(loc0, ca20$border), pch="+", col=2)
# }
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