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Returns the hetrogeneous slopes design matrix used in ANCOVA. It refereences the first level.
getxact(amat,bmat)
heterogeneous slopes analysis of covariance matrix
cell mean design matrix of factor.
matrix of covariates.
Returns the heterogeneous slopes analysis of covariance matrix.
Kloke, J. and McKean, J.W. (2014), Nonparametric statistcal methods using R, Boca Raton, FL: Chapman-Hall.