EOF - computes EOF on a field of an HFRC object. Usage: [L, EOFs, EC, error, norms, data] = EOF( hfrc_obj, fieldname, ... ) fieldname is a string with the name of the field to perform the EOF on. It can also be 'complex', in which case this function performs EOF analysis on U+iV. Finally, it can be 'double', in which case the Time-Modulation form of the Global PCA is performed, following Preisendorfer & Mobley (1988, pg. 167-172). ... are extra arguments to be given to EOF function found in the utility directory. See the help for that function for more details. If only the hfrc_obj is given, fieldname = 'double'. The mean is removed from each data point before performing the EOF analysis. Other kinds of detrending must be performed separately using HFRC/detrend or HFRC/polyfit. L are the eigenvalues of the covariance matrix ( ie. they are normalized by 1/(m-1), where m is the number of rows ). EC are the expansion coefficients (PCs in other terminology) and error is the the reconstruction error (L2-norm). data is the matrix that was input into utility/EOF.m This function depends on utility/EOF.m NOTE: This function assumes all your data is good. Interpolate beforehand or remove bad data otherwise. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% $Id: EOF.m,v 1.9 2005-01-18 23:34:31 dmk Exp $ Copyright (C) 2001 David M. Kaplan Licence: GPL (Gnu Public License) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

- EOF EOF - computes EOF on a field of an HFRC object.
- detrend DETREND - detrend an HFRC object
- end END - basic end method for HFRC objects.
- size SIZE - returns [ (num times), (num gridpts) ].
- EOF EOF - computes EOF of a matrix.

- EOF EOF - computes EOF on a field of an HFRC object.
- principal_axis PRINCIPAL_AXIS - Finds principal axis of each grid point.

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