ungrid {oce} | R Documentation |
Extract the grid points from a grid, returning columns.
This is useful for e.g. gridding large datasets, in which the first step
might be to use binMean2D
, followed by
interpBarnes
.
ungrid(x, y, grid)
x |
a vector holding the x coordinates of grid. |
y |
a vector holding the y coordinates of grid. |
grid |
a matrix holding the grid. |
A list containing three vectors: x
, the grid x values,
y
, the grid y values, and grid
, the grid values.
Dan Kelley
library(oce) data(wind) u <- interpBarnes(wind$x, wind$y, wind$z) contour(u$xg, u$yg, u$zg) U <- ungrid(u$xg, u$yg, u$zg) points(U$x, U$y, col=oce.colorsJet(100)[rescale(U$grid, rlow=1, rhigh=100)], pch=20)