The main reason to use this approach would be to do joint EOFs of several variables. For example, you might want to do a joint EOF of temperature and salinity. In that case divide each quantity by its RMS at each location, then construct a grid twice as large (presumably by extending one of the axes and regridding one variable onto the extended part of the grid using @shf). Then call the EOF routines with the extended grid, and extract the two fields from the final result.
Billy K On Jun 8, 2007, at 8:58 AM, Fabian Lienert wrote:
Hi Ferreters, Where does the external function eof_space() calculate its EOFs from? From a correlation or a covariance matrix? How can I switch between the two? Thanks a lot for any hint, Fabian -- Fabian Lienert PhD Student Canadian Centre for Climate Modelling and Analysis Meteorological Service of Canada School of Earth and Ocean Sciences University of Victoria P.O. Box 1700 Victoria, BC V8W 2Y2 CANADA phone: +1(250)363-8242 e-mail: cccma-student-003@xxxxxxxx