An example of selection of variables in both stages. Number of X- and Z- variables remaining in the model, after each iteration, for the response ‘Melibiose 2% Rate’. X-variables are displayed with red curve and are scaled on vertical left axis, while Z-variables are displayed with blue curve and are scaled on vertical right axis, both stages are shown on x-axis separately.
Mehmood et al. BMC Bioinformatics 2012 13:327 doi:10.1186/1471-2105-13-327