** (Power) operator

Spatial Analyst のライセンスで利用可能。

Image Analyst ライセンスで利用できます。

サマリー

Raises the cell values in a raster to the power of the values found in another raster.

説明

ラスター入力で演算子を使用すると、結果はラスターになります。 ただし、すべての入力値が数字の場合、結果は数字になります。

Output values are always floating point, regardless of the input value type.

Another way to perform the power operation is a **= b, which is an alternative way to write a = a ** b.

パラメーター

 オペランド 説明 データ タイプ in_raster_or_constant1 The input values to be raised to the power defined by the second input.If the first input is a raster and the second is a scalar, an output raster is created with each input raster value being raised to the power of the scalar value. Raster Layer | Constant in_raster_or_constant2 The input that determines the power to which the values in the first input will be raised.If the first input is a scalar and the second is a raster, an output raster is created with the scalar value being raised to the power of each input raster value. Raster Layer | Constant

コードのサンプル

** (Power) example 1 (Python window)

This sample uses the values in the second input raster as the power by which to raise the values in the first input raster.

``````import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outPower = Raster("degs") ** Raster("cost")
outPower.save("C:/sapyexamples/output/outpower.img")``````
** (Power) example 2 (stand-alone script)

This sample uses the values in the second input raster as the power by which to raise the values in the first input raster.

``````# Name: Op_Power_Ex_02.py
# Description: Raises the cells in a raster to the power of the values
#              found in another raster
# Requirements: Spatial Analyst Extension

# 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 = Raster("degs")
inRaster2 = Raster("cost")

# Execute Power
outPower = inRaster1 ** inRaster2

# Save the output
outPower.save("C:/sapyexamples/output/outpower")``````