| sFFLHD | sFFLHD object that gives a batch of points at a time. | 
| sFFLHD-class | sFFLHD object that gives a batch of points at a time. | 
| sFFLHDmm | sFFLHD maximin | 
| sFFLHD_Lflex | sFFLHD with flexible L | 
| split_matrix | Split a matrix by rows, based on either the number of rows per group or number of splits. |