| make_error | Simulate an error term |
| make_square_grid | Create a square grid |
| make_wx | Create Spatial Lags of variables |
| make_wxg | Calculate the effect of spatially lagged X variables |
| make_x | Simulate X variables |
| make_xb | Calculate predicted X values based on coefficients |
| make_x_bivariate | Simulate X variables |
| make_x_normal | Simulate X variables |
| make_x_uniform | Simulate X variables |
| sim_durbin | Simulate the Spatial Durbin Model |
| sim_error | Simulate Spatial Error Process |
| sim_gns | Simulate General Nested Model |
| sim_grid_listw | Generate spatial weights matrix for a grid |
| sim_mess | Simiulate Matrix Exponential Spatial Lag Model |
| sim_ols | Simulate OLS |
| sim_sar | Simulate Spatial Lag Model (SAR) |
| sim_sarar | Simulate the Spatial Autoregressive Model with Autoregressive Errors |
| sim_sem | Simulate Spatial Error Model (SEM) |
| sim_slx | Simulate Spatially Lagged X (SLX) model |
| sim_slx_error | Simulate Spatially Lagged X Error Model |