fitted_values | R Documentation |
This helper function extracts a subset of active variables (nm_act) of the relavant variables from X'X and X'y to get out-of-sample predictions for a matrix containing only the active variables This speeds up the cross-validation for post-Lasso to a large extent
fitted_values(XtX_all, Xty_all, x_pred, nm_act)
XtX_all |
Crossproduct of all covariates |
Xty_all |
Crossproduct of covariates and outcome |
x_pred |
Covariates matrix of the PREDICTION sample |
nm_act |
names of active variables |
Fitted values in the prediction sample
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