// (整除) (arcpy.sa)
摘要
将两个栅格的值逐像元地整除。
插图
讨论
使用具有栅格输入的运算符时,结果将为栅格。但是,如果所有输入为数字,那么结果也是数字。
当表达式中使用多个运算符时,其不一定按照从左到右的顺序执行。具有最高优先值的运算符将首先执行。有关运算符优先级的详细信息,请参阅运算符优先级表。您可使用括号来控制执行顺序。
此运算符的运算结果与输入的顺序有关。
当一个数除以零时,输出结果为 NoData。
如果两个输入均为整数,则输出为整数值。例如,如果 5 除以 2,则输出为 2(舍去余数)。
如果其中一个输入为浮点型,则输出的商将为浮点型。例如,如果 5.3 除以 2,则输出为 2.0(舍去余数 0.65)。
执行“整除”运算的另一个方法为 a //= b,这是 a = a // b 的另一种写法。
语法
操作数 | 说明 | 数据类型 |
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 |
返回值
名称 | 说明 | 数据类型 |
out_raster |
输出栅格对象。 The cell values are the quotient of the first input raster (dividend) divided by the second input (divisor). | Raster |
代码实例
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_IntegerDivide_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 Integer Divide
outDivide = inRaster01 // inRaster02
# Save the output
outDivide.save("C:/sapyexamples/output/outdivide2")