| pred_grid {geoR} | R Documentation |
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)
coords |
a list, matrix or data-frame with xy-coordinates of prediction points or a vector with x-coordinates. |
y.coords |
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. |
y.by |
Optional. by argument for rep to be
used with the y-coordinates. |
y.length.out |
Optional. length.out argument for
rep to be used with the y-coordinates. |
y.along.with |
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.
pred_grid(c(0,1), c(0,1), by=0.25) ## create a grid in a unit square loc0 <- pred_grid(ca20$borders, by=20) points(ca20, borders=borders) points(loc0, pch="+") points(locations.inside(loc0, ca20$border), pch="+", col=2)