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Linearly combine the gram matrices. If no weights are given, an unweighted combination is computed.

gram = combine(gramObj, optList)
gramObj - Gram object
optList - list of NAME,VALUE option pairs

'Weights' - Vector of $ K$ weights for linear combination. To guarantee positive semidefiniteness, non-negative weights can be used. Alternatively, weights can be determined using SDP.
'Kernels' - A permutation of $ 1..K$ that indicates the mapping of weights to kernels.

Darrin Lewis 2006-05-08