Available with Spatial Analyst license.
Available with Image Analyst license.
Available with 3D Analyst license.
Summary
Subtracts the value of the second input raster from the value of the first input raster on a cell-by-cell basis.
Illustration
Usage
The order of inputs is relevant for this tool.
If both inputs are integer, the output will be an integer raster; otherwise, it will be a floating-point raster.
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, or one of the inputs is a constant, the output will be a multiband raster. The number of bands in each multiband input must be the same.
The tool will perform the operation on each band from one input against the corresponding band from the other input. If one of the inputs is a multiband raster and the other input is a constant, the tool will perform the operation against the constant value for each band in the multiband input.
Syntax
Minus(in_raster_or_constant1, in_raster_or_constant2)
Parameter | Explanation | Data Type |
in_raster_or_constant1 | The input from which to subtract the values in 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 values to subtract from the values in the first 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 |
Return Value
Name | Explanation | Data Type |
out_raster | The output raster. The cell values are the result of subtracting the second input from the first. | Raster |
Code sample
This example subtracts the values of the second input raster from the first.
import arcpy
from arcpy import env
from arcpy.ia import *
env.workspace = "C:/iapyexamples/data"
outMinus = Minus("degs", "negs")
outMinus.save("C:/iapyexamples/output/outminus")
This example subtracts the values of the second input raster from the first.
# Name: Minus_Ex_02.py
# Description: Subtracts the value of the second input raster from the
# value of the first input raster 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
inRaster1 = "degs"
inRaster2 = "negs"
# Check out the ArcGIS Image Analyst extension license
arcpy.CheckOutExtension("ImageAnalyst")
# Execute Minus
outMinus = Minus(inRaster1, inRaster2)
# Save the output
outMinus.save("C:/iapyexamples/output/outminus.tif")
Environments
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