RandomNumberGenerator (arcpy)
Zusammenfassung
Determines the type and seed that will be used to create random numbers between 0 and 1 for all tools that utilize random numbers, for example, CreateRandomRaster, CreateRandomPoints, and the ArcGIS.Rand() function.
Returned from the randomGenerator environment.
Methodenübersicht
Methode | Erläuterung |
exportToString () |
Exports the object to its string representation. |
loadFromString (string) |
Restore the object using its string representation. The exportToString method can be used to create a string representation. |
Methoden
exportToString ()
Datentyp | Erläuterung |
String |
The string representation of the object. |
loadFromString (string)
Parameter | Erläuterung | Datentyp |
string |
The string representation of the object. | String |
Codebeispiel
RandomNumberGenerator example
Demonstrate how to create a random number generator object.
import arcpy
from arcpy import env
# Cannot create RandomNumberGenerator object directly,
# but is returned from CreateRandomValueGenerator function.
#
# CreateRandomValueGenerator takes 2 arguments, seed and distribution method.
# The distribution method options are ACM599,
# MERSENNE_TWISTER, 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')")
# Get the value from the result object and print it to the Python window.
#
val = float(result.getOutput(0))
print val
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9/11/2013