/ (Division) (arcpy.sa)
Resumen
Divides the values of two rasters on a cell-by-cell basis.
Ilustración
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OutRas = Raster("InRas1") / Raster("InRas2") |
Debate
Cuando se utiliza un operador con una entrada ráster, el resultado será un ráster. Sin embargo, si todas las entradas son números, entonces el resultado es un número.
Cuando se utilizan varios operadores en una expresión, no necesariamente se ejecutan en orden de izquierda a derecha. El operador con el valor de jerarquía más alta se ejecutará primero. Para obtener más información sobre la jerarquía del operador, consulte la tabla jerarquía del operador. Puede utilizar paréntesis para controlar el orden de ejecución.
El orden de entrada es importante para este operador.
When a number is divided by zero, the output result is NoData.
If both inputs are integers, the divide operator performs an integer division, and the output contains integer values. For example, if 3 is divided by 2, the output is 1.
If either input is of floating-point type, the divide operator performs a floating-point division, and the output contains floating-point values. For example, if 3 is divided by 2.0, the output is 1.5.
Another way to perform the divide operation is a /= b which is an alternative way to write a = a / b.
Sintaxis
| Operando | Explicación | Tipo de datos |
in_raster_or_constant1 |
The input whose values will be divided 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 divided by the scalar value. | Raster Layer | Constant |
in_raster_or_constant2 |
The input whose values the first input are to be divided by. If the first input is a scalar and the second is a raster, an output raster is created with each input raster value being divided into the scalar value. | Raster Layer | Constant |
Valor de retorno
| Nombre | Explicación | Tipo de datos |
| out_raster |
El objeto ráster de salida. The cell values are the quotient of the first input raster (dividend) divided by the second input (divisor). | Raster |
Ejemplo de código
This sample divides the values of the first input raster by the second.
import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outDivide = Raster("degs") / Raster("negs")
outDivide.save("C:/sapyexamples/output/outdivide")
This sample divides the values of the first input raster by the second.
# Name: Op_Divide_Ex_02.py
# Description: Divides the values of two rasters on a cell-by-cell basis
# 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
inRaster01 = Raster("elevation")
inRaster02 = Raster("landuse")
# Check out the ArcGIS Spatial Analyst extension license
arcpy.CheckOutExtension("Spatial")
# Execute Divide
outDivide = inRaster01 / inRaster02
# Save the output
outDivide.save("C:/sapyexamples/output/outdivide2")