Interpolation to a regular grid via triangulation

tri_fun(xy, value, grid = NULL, ...)

Arguments

xy	coordinates
value	value to interpolate
grid	grid to use
...	ignored

Value

raster

Examples

zero_extent <- raster::extent(0, ncol(volcano), 0, nrow(volcano))
r <- raster::setExtent(raster::raster(volcano), zero_extent)
xy <- raster::sampleRandom(r, size = 150, xy = TRUE)[, 1:2, drop = FALSE]
tri_est <- tri_fun(xy, raster::extract(r, xy))

grd <- raster::raster(raster::extent(xy) ,res = 0.1)
tri_est2 <- tri_fun(xy, raster::extract(r, xy), grid = grd)