radial        R code for plotting 3D perspective plot for the `radial' function
test_nomad_factor    R code for testing NOMAD for factor regression splines
test_nomad_kernel    R code for testing NOMAD for categorical regression splines
crsiv                R code for testing crsiv with one endogenous predictor, no exogenous predictors
crsiv_exog           R code for testing crsiv with endogenous and exogenous predictors
crsiv_exog_persp     R code for testing crsiv with endogenous and exogenous predictors plotting results in a perspective plot
