Nested.covariance_matrix(expval, index)
[source]
Returns the working covariance or correlation matrix for a given cluster of data.
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© 2009–2012 Statsmodels Developers
© 2006–2008 Scipy Developers
© 2006 Jonathan E. Taylor
Licensed under the 3-clause BSD License.
http://www.statsmodels.org/stable/generated/statsmodels.genmod.cov_struct.Nested.covariance_matrix.html