ungrid {oce} | R Documentation

## Extract (x, y, z) from (x, y, grid)

### Description

Extract the grid points from a grid, returning columns.

### 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.

### Details

This is useful for e.g. gridding large datasets, in which the first step might be to use `binMean2D`, followed by `interpBarnes`.

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

[Package oce version 0.9-18 Index]