ungrid: Extract (x, y, z) From (x, y, grid)

In oce: Analysis of Oceanographic Data

Extract (x, y, z) From (x, y, grid)

Description

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().

Usage

ungrid(x, y, grid)

Arguments

x	a vector holding the x coordinates of grid.
y	a vector holding the y coordinates of grid.
grid	a matrix holding the grid.

Value

A list containing three vectors: x, the grid x values, y, the grid y values, and grid, the grid values.

Author(s)

Dan Kelley

Examples

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$y, col = oce.colorsViridis(100)[rescale(U$grid, rlow = 1, rhigh = 100)], pch = 20)

oce documentation built on Sept. 11, 2024, 7:09 p.m.