Negate (Spatial Analyst)
Summary
Changes the sign (multiplies by -1) of the cell values of the input raster on a cell-by-cell basis.
Illustration
Usage
Syntax
Negate (in_raster_or_constant)
Parameter | Explanation | Data Type |
in_raster_or_constant |
The input raster to be negated (multiplied by -1). In order to use a number as an input for this parameter, 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 input values negated (multiplied by -1). | Raster |
Code Sample
Negate example 1 (Python window)
This example changes the sign of the values in the input raster and outputs a GRID raster.
import arcpy from arcpy import env from arcpy.sa import * env.workspace = "C:/sapyexamples/data" outNegate = Negate("degs") outNegate.save("C:/sapyexamples/output/outneg")
Negate example 2 (stand-alone script)
This example changes the sign of the values in the input raster and outputs a GRID raster.
# Name: Negate_Ex_02.py # Description: Changes the sign (multiplies by -1) of the cell values # of the input raster on a cell-by-cell basis # 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 inRaster = "degs" # Check out the ArcGIS Spatial Analyst extension license arcpy.CheckOutExtension("Spatial") # Execute Negate outNegate = Negate(inRaster) # Save the output outNegate.save("C:/sapyexamples/output/outnegate")
Environments
Related Topics
Licensing Information
ArcView: Requires Spatial Analyst
ArcEditor: Requires Spatial Analyst
ArcInfo: Requires Spatial Analyst
6/29/2011