Module 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
- Specification: grid
- 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 (optional output) | RESIDUALS | - | - |
Regression | Grid (output) | REGRESSION | - | - | |
Options | Dependent Variable | Table field | ATTRIBUTE | - | - |
Grid Interpolation | Choice | INTERPOL | - | Available Choices: [0] Nearest Neighbor [1] Bilinear Interpolation [2] Inverse Distance Interpolation [3] Bicubic Spline Interpolation [4] B-Spline Interpolation Default: 4 | |
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>] [-INTERPOL <str>] [-COORD_X <str>] [-COORD_Y <str>] [-INTERCEPT <str>] [-METHOD <str>] [-P_VALUE <str>] -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 (optional output) -REGRESSION:<str> Regression Grid (output) -INTERPOL:<str> Grid Interpolation Choice Available Choices: [0] Nearest Neighbor [1] Bilinear Interpolation [2] Inverse Distance Interpolation [3] Bicubic Spline Interpolation [4] B-Spline Interpolation Default: 4 -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:<str> Significance Level Floating point Minimum: 0.000000 Maximum: 100.000000 Default: 5.000000