# rcsgen

The rcsgen command generates basis function for restricted cubic splines. The command is used by my stpm2 command to fit flexible parameric survival models. It has a number of advantages over Stata’s inbuilt mkspline command, which will be demonstrated in the tutorials below.

## Using rcsgen

• Generating splines - use of the knots(), bkknots() and percentiles() options.
• Using the scalar() option for predictions.
• Using the center() optin for easier predictions
• Some issues when orthogonalising.
• The derivative of resicted cubic spline function (the dgen() option).