Tool Zonal Multiple Regression Analysis (Points and Predictor Grids)
Linear regression analysis of point attributes using multiple predictor grids. Details of the regression/correlation analysis will be saved to a table. The regression function is used to create a new grid with regression based values. The multiple regression analysis uses a forward selection procedure. Each polygon in the zones layer is processed as individual zone.
Reference:
- Bahrenberg, G., Giese, E., Nipper, J. (1992): 'Statistische Methoden in der Geographie 2 - Multivariate Statistik', Stuttgart, 415p.
- Author: O.Conrad, P.Gandelli (c) 2015
- Menu: Spatial and Geostatistics|Regression
Parameters
| Name | Type | Identifier | Description | Constraints | |
|---|---|---|---|---|---|
| Input | Predictors | Grid list, input | PREDICTORS | - | - |
| Zones | Shapes, input | ZONES | - | - | |
| Points | Shapes, input | POINTS | - | - | |
| Output | Residuals (*) | Shapes, output, optional | RESIDUALS | - | - |
| Regression | Grid, output | REGRESSION | - | - | |
| Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Dependent Variable | Table field | ATTRIBUTE | - | - | |
| Resampling | Choice | RESAMPLING | - | Available Choices: [0] Nearest Neighbour [1] Bilinear Interpolation [2] Bicubic Spline Interpolation [3] B-Spline Interpolation Default: 3 | |
| Include X Coordinate | Boolean | COORD_X | - | Default: 0 | |
| Include Y Coordinate | Boolean | COORD_Y | - | Default: 0 | |
| Intercept | Boolean | INTERCEPT | - | Default: 1 | |
| Method | Choice | METHOD | - | Available Choices: [0] include all [1] forward [2] backward [3] stepwise Default: 3 | |
| Significance Level | Floating point | P_VALUE | Significance level (aka p-value) as threshold for automated predictor selection, given as percentage | Minimum: 0.000000 Maximum: 100.000000 Default: 5.000000 | |
| (*) optional | |||||
Command-line
Usage: saga_cmd statistics_regression 15 [-PREDICTORS <str>] [-ZONES <str>] [-POINTS <str>] [-ATTRIBUTE <str>] [-RESIDUALS <str>] [-REGRESSION <str>] [-RESAMPLING <str>] [-COORD_X <str>] [-COORD_Y <str>] [-INTERCEPT <str>] [-METHOD <str>] [-P_VALUE <double>] -PREDICTORS:<str> Predictors Grid list, input -ZONES:<str> Zones Shapes, input -POINTS:<str> Points Shapes, input -ATTRIBUTE:<str> Dependent Variable Table field -RESIDUALS:<str> Residuals Shapes, output, optional -REGRESSION:<str> Regression Grid, output -RESAMPLING:<str> Resampling Choice Available Choices: [0] Nearest Neighbour [1] Bilinear Interpolation [2] Bicubic Spline Interpolation [3] B-Spline Interpolation Default: 3 -COORD_X:<str> Include X Coordinate Boolean Default: 0 -COORD_Y:<str> Include Y Coordinate Boolean Default: 0 -INTERCEPT:<str> Intercept Boolean Default: 1 -METHOD:<str> Method Choice Available Choices: [0] include all [1] forward [2] backward [3] stepwise Default: 3 -P_VALUE:<double> Significance Level Floating point Minimum: 0.000000 Maximum: 100.000000 Default: 5.000000