| adjacent | Determine adjacent points | 
| as.starray | Convert array to 'starray' | 
| as.sts | Convert object to 'sts' class | 
| assemble | Assemble spline ingredients for sandwich smooth | 
| assemble.hero_bspline | Assemble spline ingredients for sandwich smooth | 
| assemble.hero_radspline | Assemble spline ingredients for sandwich smooth | 
| assemble.list | Assemble spline ingredients for sandwich smooth | 
| as_starray | Convert array to 'starray' | 
| as_sts | Convert object to 'sts' class | 
| border.grid | Construct border for grid | 
| BorderGrid | Construct border for grid | 
| borderGrid | Construct border for grid | 
| border_grid | Construct border for grid | 
| bspline | B-spline specification | 
| circulate | Circulate values of a vector | 
| connect | Connect 'hero_radsplines' | 
| create.prepared_list | Manually create a 'prepared_list' | 
| default.evalargs | Construct default 'evalargs' | 
| default.splines | Construct default splines | 
| diffpen | P-spline difference penalty | 
| enhance | Enhance penalty value | 
| enhance.grid | Enhance penalty value using grid search | 
| enlarge | Enlarge spatial domain | 
| generate.data2d | Generate 2d data | 
| generate.data3d | Generate 3d data | 
| GenerateData2d | Generate 2d data | 
| generateData2d | Generate 2d data | 
| GenerateData3d | Generate 3d data | 
| generateData3d | Generate 3d data | 
| generate_data2d | Generate 2d data | 
| generate_data3d | Generate 3d data | 
| hero | Construct a hero sandwich smoother | 
| hero.prepared_array | Construct a hero sandwich smoother | 
| hero.prepared_list | Construct a hero sandwich smoother | 
| hero.prepared_matrix | Construct a hero sandwich smoother | 
| hero.prepared_numeric | Construct a hero sandwich smoother | 
| hero.prepared_sequential | Construct a hero sandwich smoother | 
| hero.prepared_starray | Construct a hero sandwich smoother | 
| hero.prepared_sts | Construct a hero sandwich smoother | 
| knot.design | Design knot/breakpoint spacing | 
| KnotDesign | Design knot/breakpoint spacing | 
| knotDesign | Design knot/breakpoint spacing | 
| knot_design | Design knot/breakpoint spacing | 
| kronecker.seq | A sequence of kronecker products | 
| KroneckerSeq | A sequence of kronecker products | 
| kroneckerSeq | A sequence of kronecker products | 
| kronecker_seq | A sequence of kronecker products | 
| lat | Computer-generated temperature data | 
| loglambda2gcv | Determine GCV statistic | 
| lon | Computer-generated temperature data | 
| ludata | Data for f1 function from Lu et al. (2012) | 
| lunoisyf1 | Data for f1 function from Lu et al. (2012) | 
| lutruef1 | Data for f1 function from Lu et al. (2012) | 
| plot.hero_adjacent | Plot a 'hero_adjacent' object | 
| plot.hero_bspline | Plot a 'hero_bspline' object | 
| plot.hero_enlarge | Plot a 'hero_enlarge' object | 
| plot.hero_matrix | Plot a 'hero' object | 
| plot.hero_numeric | Plot a 'hero' object | 
| plot.hero_radspline | Plot a 'hero_radspline' | 
| poly2SpatialPolygons | Convert simple polygon to a 'SpatialPolygons' object | 
| precompute | Precompute objects | 
| predict.hero | Predict method for 'hero' object | 
| predict.hero_bspline | Predict method for 'hero_bspline' object | 
| predict.hero_radspline | Predict method for a 'hero_radspline' | 
| prepare | Prepare data for sandwich smooth | 
| prepare.array | Prepare data array for sandwich smooth | 
| prepare.list | Prepare data array for sandwich smooth | 
| prepare.matrix | Prepare data matrix for sandwich smooth | 
| prepare.numeric | Prepare data vector for sandwich smooth | 
| prepare.starray | Prepare 'starray' for sandwich smooth | 
| prepare.sts | Prepare 'starray' for sandwich smooth | 
| prepare_sequential | Sequentially prepare data for sandwich smooth | 
| radspline | Radial basis spline specification | 
| rh | Rotated H-transform | 
| rh.seq | Apply 'rh' sequentially | 
| RhSeq | Apply 'rh' sequentially | 
| rhSeq | Apply 'rh' sequentially | 
| rh_seq | Apply 'rh' sequentially | 
| spdiffpen | Spatial difference penalty | 
| starray | Convert array to 'starray' | 
| sts | Convert object to 'sts' class | 
| tasmax | Computer-generated temperature data | 
| wrfg_cgcm3_tasmax | Computer-generated temperature data | 
| wrfg_lat | Computer-generated temperature data | 
| wrfg_lon | Computer-generated temperature data | 
| x | Data for f1 function from Lu et al. (2012) | 
| z | Data for f1 function from Lu et al. (2012) |