mice.impute.norm.predict(y, ry, x, ridge=0.00001, ...)nFALSE=missing, TRUE=observed)n x p) of complete covariates.nmis with imputations.ridge parameter adds 
a penalty term ridge*diag(xtx) to the variance-covariance matrix xtx.mice: Multivariate Imputation by Chained Equations in R.
Journal of Statistical Software, 45(3), 1-67.