R: Rearrange areal matrix so Greenwich is near the centre

matrixShiftLongitude {oce} | R Documentation

## Rearrange areal matrix so Greenwich is near the centre

### Description

Sometimes datasets are provided in matrix form, with first index corresponding to longitudes ranging from 0 to 360. `matrixShiftLongitude` cuts such matrices at longitude=180, and swaps the pieces so that the dateline is at the left of the matrix, not in the middle.

### Usage

    matrixShiftLongitude(m, longitude)

### Arguments

`m` | The matrix to be modified.
`longitude` | A vector containing the longitude in the 0-360 convention. If missing, this is constructed to range from 0 to 360, with as many elements as the first index of `m`.

### Value

A list containing `m` and `longitude`, both rearranged as appropriate.

### See Also

`shiftLongitude()` and `standardizeLongitude()`.

[Package oce version 1.7-2 Index]