Exp (Spatial Analyst)
Summary
Calculates the base e exponential of the cells in a raster.
Illustration
Usage
Input values can be integer or float, and can be negative as well as positive.
See here for some examples of the outputs for floating point input values from the Exponential tools.

The base e exponential is the most commonly used exponential function.

Input values less than or equal to 745 will be set to NoData in the output, because these values cannot be accurately represented by 32bit floatingpoint numbers.
The output raster from this tool is always floating point type, regardless of the input value type.
Output values from this tool are always positive.
Syntax
Parameter  Explanation  Data Type 
in_raster_or_constant 
The input values for which to find the base e exponential. 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 base e exponential of the input values.  Raster 
Code Sample
This example calculates the base e exponential of the input raster values, and returns the result as a TIFF raster.
import arcpy from arcpy import env from arcpy.sa import * env.workspace = "C:/sapyexamples/data" outExp = Exp("landuse") outExp.save("C:/sapyexamples/output/outexp.tif")
This example calculates the base e exponential of the input raster values.
# Name: Exp_Ex_02.py # Description: Calculates the base e exponential of cells in a raster # 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 = "landuse" # Check out the ArcGIS Spatial Analyst extension license arcpy.CheckOutExtension("Spatial") # Execute Exp outExp = Exp(inRaster) # Save the output outExp.save("C:/sapyexamples/output/outexp")