oce (version 0.9-20)

matrixShiftLongitude: 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.