# Divide (Image Analyst)

## Summary

Divides the values of two rasters on a cell-by-cell basis.

## Usage

• The order of inputs is relevant for this tool.

• When a number is divided by zero, the output result is NoData.

• The data types of the inputs to determine the data type of the output:

• If both inputs are integers, an integer division is performed, and the output result is an integer. For example, if 3 is divided by 2, the output is 1.
• If either input is floating-point, a floating-point division is performed, and the output result is a floating-point value. For example, if 3 is divided by 2.0, the output is 1.5.

• If both inputs are single-band rasters or one of the inputs is a constant, the output will be a single-band raster.

• If both inputs are multiband rasters, the tool will perform the operation on each band from one input, and the output will be a multiband raster. The number of bands in each multiband input must be the same.

• If one of the inputs is a multiband raster and the other input is a constant, the tool will perform the operation using the constant value for each band in the multiband input, and the output will be a multiband raster.

• If both inputs are multidimensional raster data with the same number of variables, the tool will perform the operation for all slices with the same dimension value. The output will be a multidimensional raster in CRF format. The variables in the inputs must have at least one common dimension and one common dimensional value for this tool to process; otherwise, an error will occur.

If both inputs have one variable but different names, uncheck the Match Multidimensional Variable geoprocessing environment (set arcpy.env.matchMultidimensionalVariable = False in Python) before running the tool.

If one of the inputs is a multidimensional raster and the other input is a constant, the tool will perform the operation for all slices for all variables using the constant value, and the output will be a multidimensional raster.

• In map algebra, the equivalent operator symbol for this tool is "/" (link).

## Parameters

 Label Explanation Data Type Input raster or constant value 1 The input whose values will be divided by the second input.A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To specify a number for both inputs, the cell size and extent must first be set in the environment. Raster Layer; Constant Input raster or constant value 2 The input whose values the first input are to be divided by.A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To specify a number for both inputs, the cell size and extent must first be set in the environment. Raster Layer; Constant

### Return Value

 Label Explanation Data Type Output raster The output raster.The cell values are the quotient of the first input raster (dividend) divided by the second input (divisor). Raster

`Divide(in_raster_or_constant1, in_raster_or_constant2)`
 Name Explanation Data Type in_raster_or_constant1 The input whose values will be divided by the second input.A number can be used as an input for this parameter, provided a raster is specified for the other parameter. 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 input whose values the first input are to be divided by.A number can be used as an input for this parameter, provided a raster is specified for the other parameter. 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.The cell values are the quotient of the first input raster (dividend) divided by the second input (divisor). Raster

### Code sample

Divide example 1 (Python window)

This example divides the values of the first input raster by the second.

``````import arcpy
from arcpy import env
from arcpy.ia import *
env.workspace = "C:/iapyexamples/data"
outDivide = Divide("degs", "negs")
outDivide.save("C:/iapyexamples/output/outdivide2")``````
Divide example 2 (stand-alone script)

This example divides the values of the first input raster by the second.

``````# Name: Divide_Ex_02.py
# Description: Divides the values of two rasters on a pixel-by-pixel basis
# Requirements: Image Analyst Extension

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

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

# Set local variables
inRaster01 = "elevation"
inRaster02 = "landuse"

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

# Execute Divide
outDivide = Divide(inRaster01, inRaster02)

# Save the output
outDivide.save("C:/iapyexamples/output/outdivide")``````

## Licensing information

• Basic: Requires Image Analyst or Spatial Analyst or 3D Analyst
• Standard: Requires Image Analyst or Spatial Analyst or 3D Analyst
• Advanced: Requires Image Analyst or Spatial Analyst or 3D Analyst