CreateRandomValueGenerator (arcpy)

摘要

创建新的随机数生成器。

语法

CreateRandomValueGenerator (seed, distribution)

参数	说明	数据类型
seed	Initializes the random number generator.	Integer
distribution	The random generation algorithm. ACM599 —ACM collected algorithm 599 MERSENNE_TWISTER —Mersenne Twister mt19937 STANDARD_C —Standard C Rand (默认值为 ACM599)	String

返回值

数据类型	说明
Object	RandomNumberGenerator 对象。

代码实例

CreateRandomValueGenerator 示例

创建并初始化随机数生成器对象。

import arcpy
from arcpy import env

#   CreateRandomValueGenerator takes 2 arguments, seed and distribution method.
#   The distribution method options are ACM599, MERSENNE_TWISTER,
#   and STANDARD_C.
#
#   The gen variable is a randomNumberGenerator object that is assigned to
#   the randomGenerator environments setting.
#
env.randomGenerator = arcpy.CreateRandomValueGenerator(20, "STANDARD_C")

# Calculate a random number using the ArcGIS.Rand() function
#
result = arcpy.CalculateValue_management("arcgis.rand('normal 0.0 10.0')")

# Print the returned value from the Result object
#
val = float(result.getOutput(0))
print val