A graphical display of values generated according to a penalized regression model for multiple parameters of a data set shows the values as a graph having a first axis that represents magnitude of multiple parameter estimates of the penalized regression model and having a second axis that represents parameter estimate values of the multiple parameters of the penalized regression model. A user input is received that comprises a change to a parameter handle of the graphical display and changes at least one data parameter of the penalized regression model. The graphical display is changed such that the graphical display shows a representation of the values for the penalized regression model in accordance with the changes.