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| q |
The orthogonal constrain on EOFs sometime cause the
spatial structures
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of EOFS to have significant amplitudes all over the
spatial domain.
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č We can not get localized EOF structures.
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č Therefore, we want to relax the spatial orthogonal
constrain
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on EOFs (but still
keep the temporal orthogonal constrain).
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č We apply the Rotated EOF analysis.
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To perform the rotated EOF analysis, we still have to do
the regular
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EOF first.
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č We then only keep a few EOF modes for the rotation.
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č We “rotated” these selected few EOFs to form new EOFs
(factors).
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based on some
criteria.
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č These criteria determine how “simple” the new factors
are.
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