# Combinatorial Or (Spatial Analyst)

## Summary

Performs a Combinatorial Or operation on the cell values of two input rasters.

If either input value is true (non-zero), the output is a different value for each unique combination of input values. If both inputs are false (zero), the output value is 0.

## Illustration

 OutRas = CombinatorialOr(InRas1, InRas2)

## Usage

• The Combinatorial math tools interpret the inputs as Boolean values, where non-zero values are considered true, and zero values are considered false.

• Two inputs are necessary for this Combinatorial evaluation to take place.

• The order of inputs for this tool is only relevant for the output attribute table.

## Syntax

CombinatorialOr (in_raster_or_constant1, in_raster_or_constant2)
 Parameter Explanation Data Type in_raster_or_constant1 The first input to use in this combinatorial operation.It must be of positive integer type.A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To be able to specify a number for both inputs, the cell size and extent must first be set in the environment. Raster Layer | Constant in_raster_or_constant2 The second input to use in this combinatorial operation.It must be of positive integer type.A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To be able to specify a number for both inputs, the cell size and extent must first be set in the environment. Raster Layer | Constant

#### Return Value

 Name Explanation Data Type out_raster The output raster. Raster

## Code Sample

CombinatorialOr example 1 (Python window)

This example performs a Combinatorial Or operation on two GRID rasters and outputs the result as an IMG raster.

```import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outCOr = CombinatorialOr("degs", "cost")
outCOr.save("C:/sapyexamples/output/outcor.img")```
CombinatorialOr example 2 (stand-alone script)

This example performs a Combinatorial Or operation on two GRID rasters.

```# Name: CombinatorialOr_Ex_02.py
# Description: Performs a Combinatorial Or operation on the cell
#              values of two input rasters
# Requirements: Spatial Analyst Extension
# Author: ESRI

# Import system modules
import arcpy
from arcpy import env
from arcpy.sa import *

# Set environment settings
env.workspace = "C:/sapyexamples/data"

# Set local variables
inRaster1 = "degs"
inRaster2 = "cost"

# Check out the ArcGIS Spatial Analyst extension license
arcpy.CheckOutExtension("Spatial")

# Execute CombinatorialOr
outCOr = CombinatorialOr(inRaster1, inRaster2)

# Save the output
outCOr.save("C:/sapyexamples/output/outcor")```

## Licensing Information

ArcView: Requires Spatial Analyst
ArcEditor: Requires Spatial Analyst
ArcInfo: Requires Spatial Analyst

6/29/2011