| ar_gen | Generate an autoregressive model. | 
| block_diag_gen | Generate a model with block-diagonal structure | 
| matimage | Plot the sparsity pattern of a square matrix | 
| sample_gen | Generate random samples. | 
| varband | Compute the varband estimate for a fixed tuning parameter value with different penalty options. | 
| varband_cv | Perform nfolds-cross validation | 
| varband_gen | Generate a model with variable bandwidth. | 
| varband_path | Solve main optimization problem along a path of lambda |