SAGA-GIS Module Library Documentation (v2.2.2)

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.

Parameters

 NameTypeIdentifierDescriptionConstraints
InputPredictorsGrid list (input)PREDICTORS--
ZonesShapes (input)ZONES--
PointsShapes (input)POINTS--
OutputResiduals (*)Shapes (optional output)RESIDUALS--
RegressionGrid (output)REGRESSION--
OptionsDependent VariableTable fieldATTRIBUTE--
Grid InterpolationChoiceINTERPOL-Available Choices:
[0] Nearest Neighbor
[1] Bilinear Interpolation
[2] Inverse Distance Interpolation
[3] Bicubic Spline Interpolation
[4] B-Spline Interpolation
Default: 4
Include X CoordinateBooleanCOORD_X-Default: 0
Include Y CoordinateBooleanCOORD_Y-Default: 0
InterceptBooleanINTERCEPT-Default: 1
MethodChoiceMETHOD-Available Choices:
[0] include all
[1] forward
[2] backward
[3] stepwise
Default: 3
Significance LevelFloating pointP_VALUESignificance level (aka p-value) as threshold for automated predictor selection, given as percentageMinimum: 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