概要
The CrossValidationResult class is returned by the Cross Validation tool and contains access to the cross-validation results that can be generated for any geostatistical layer.
ディスカッション
The CrossValidationResult class is similar to the Result class except for the additional read-only properties that it contains. For detailed help, see the Cross Validation tool.
Only the mean and root mean square error results are available for IDW, Global Polynomial Interpolation, Radial Basis Functions, Diffusion Interpolation With Barriers, and Kernel Interpolation With Barriers.
Percent in 90% Interval, Percent in 95% Interval, and Average CRPS are only available for Empirical Bayesian Kriging and EBK Regression Prediction models.
プロパティ
| プロパティ | 説明 | データ タイプ |
| averageCRPS (読み取り専用) | The average of the Continuous Ranked Probability Scores (CRPS) for all points. | Double |
| averageStandard (読み取り専用) | The average of the prediction standard errors. | Double |
| count (読み取り専用) | The number of input samples. | Long |
| inputCount (読み取り専用) | Returns the number of inputs. | Integer |
| maxSeverity (読み取り専用) | Returns the maximum severity of the messages.
| Integer |
| meanError (読み取り専用) | The averaged difference between the measured and the predicted values. | Double |
| meanStandardized (読み取り専用) | Mean standardized error. | Double |
| messageCount (読み取り専用) | Returns the number of messages. | Integer |
| outputCount (読み取り専用) | Returns the number of outputs. | Integer |
| percentIn90Interval (読み取り専用) | The percentage of points that are contained in a 90 percent cross validated confidence interval. | Double |
| percentIn95Interval (読み取り専用) | The percentage of points that are contained in a 95 percent cross validated confidence interval. | Double |
| resultID (読み取り専用) | Gets the job ID. If the tool is not a geoprocessing service, the resultID will be "". | String |
| rootMeanSquare (読み取り専用) | The root mean square error. | Double |
| rootMeanSquareStandardized (読み取り専用) | The root-mean-square-standardized error should be close to 1 if the prediction standard errors are valid. If the root-mean-square-standardized error is greater than 1, you are underestimating the variability in your predictions. If the root-mean-square-standardized error is less than 1, you are overestimating the variability in your predictions. | Double |
| status (読み取り専用) | Gets the job status.
| Integer |
手法の概要
| 手法 | 説明 |
| cancel () | Cancels an associated job |
| getInput (index) | Returns a given input, either as a recordset or string. |
| getMapImageURL ({parameter_list}, {height}, {width}, {resolution}) | Gets a map service image for a given output, if one exists. |
| getMessage (index) | Returns a specific message. |
| getMessages ({severity}) | Returns messages. |
| getOutput (index) | Returns a given output, either as a string or a RecordSet. If the output of the tool, such as Make Feature Layer, is a layer, getOutput will return a Layer object. |
| getSeverity (index) | Returns the severity of a specific message. |
手法
cancel ()
getInput (index)
| パラメーター | 説明 | データ タイプ |
index | The index position of the input. | Integer |
| データ タイプ | 説明 |
| Object | The input, either as a recordset or string. |
getMapImageURL ({parameter_list}, {height}, {width}, {resolution})| パラメーター | 説明 | データ タイプ |
parameter_list | Parameter(s) on which the map service image will be based. | Integer |
height | The height of the image. | Double |
width | The width of the image. | Double |
resolution | The resolution of the image. | Double |
| データ タイプ | 説明 |
| String | The URL of the map image. |
getMessage (index)
| パラメーター | 説明 | データ タイプ |
index | The index position of the message. | Integer |
| データ タイプ | 説明 |
| String | The geoprocessing message. |
getMessages ({severity})| パラメーター | 説明 | データ タイプ |
severity | The type of messages to be returned: 0=message, 1=warning, 2=error. Not specifying a value returns all message types.
(デフォルト値は次のとおりです 0) | Integer |
| データ タイプ | 説明 |
| String | The geoprocessing messages. |
getOutput (index)
| パラメーター | 説明 | データ タイプ |
index | The index position of the outputs. | Integer |
| データ タイプ | 説明 |
| Object | The output, either as a recordset or a string. If the output of the tool, such as Make Feature Layer, is a layer, getOutput will return a Layer object. Result outputs can also be accessed by index, so result.getOutput(0) and result[0] are equivalent. |
getSeverity (index)
| パラメーター | 説明 | データ タイプ |
index | The message index position. | Integer |
| データ タイプ | 説明 |
| Integer | The severity of the specific message.
|
コードのサンプル
Perform cross-validation on an input geostatistical layer.
import arcpy
arcpy.env.workspace = "C:/gapyexamples/data"
cvResult = arcpy.CrossValidation_ga("C:/gapyexamples/data/kriging.lyr")
print("Root Mean Square error = " + str(cvResult.rootMeanSquare))Perform cross-validation on an input geostatistical layer.
# Name: CrossValidation_Example_02.py
# Description: Perform cross validation on an input geostatistical layer.
# Requirements: Geostatistical Analyst Extension
# Import system modules
import arcpy
# Set environment settings
arcpy.env.workspace = "C:/gapyexamples/data"
# Set local variables
inLayer = "C:/gapyexamples/data/kriging.lyr"
# Execute CrossValidation
cvResult = arcpy.CrossValidation_ga(inLayer)
print("Root Mean Square error = " + str(cvResult.rootMeanSquare))