WeibullDataSet.Calculate

Member of: SynthesisAPI.WeibullDataSet

Fits a life distribution to the current data set and creates a cModel object that represents the fitted model. Returns a message box that shows the estimated parameters of the fitted model.

To specify the life distribution, parameter estimation method and other analysis settings, use the AnalysisSettings and GeneralSettings properties of the associated WeibullDataSet object.

If no data set has been defined, the method prompts the user to enter the parameters for the specified distribution.

Syntax

.Calculate

Example

VBA

 'Declare a new WeibullDataSet object.  
  Dim WDS As New WeibullDataSet
  
 'Add failure times to the data set. 
  Call WDS.AddFailure(100, 1)
  Call WDS.AddFailure(120, 1)
  Call WDS.AddFailure(130, 1)  
 
 'Set the life distribution. Leave all other settings at default. 
  WDS.AnalysisSettings.Distribution = WeibullSolverDistribution_Weibull
  WDS.AnalysisSettings.Parameters = WeibullSolverNumParameters_MS_2Parameter
 
 'Analyze the data set. 
  WDS.Calculate()
  
 'Retrieve the fitted life distribution model. 
  Dim model As cModel
  Set model = WDS.FittedModel

 'Using the model, calculate the reliability at 100 hrs and display the result. 
  Dim r As Double
  r = model.reliability(100)
  MsgBox("Reliability at 100 hrs: " & r)

VB.NET

 'Declare a new WeibullDataSet object.  
  Dim WDS As New WeibullDataSet
  
 'Add failure times to the data set. 
  WDS.AddFailure(100, 1)
  WDS.AddFailure(120, 1)
  WDS.AddFailure(130, 1)  
 
 'Set the life distribution. Leave all other settings at default. 
  WDS.AnalysisSettings.Distribution = WeibullSolverDistribution.Weibull
  WDS.AnalysisSettings.Parameters = WeibullSolverNumParameters.MS_2Parameter
 
 'Analyze the data set. 
  WDS.Calculate()
  
 'Retrieve the fitted life distribution model. 
  Dim model As cModel
  model = WDS.FittedModel

 'Using the model, calculate the reliability at 100 hrs and display the result. 
  Dim r As Double
  r = model.reliability(100)
  MsgBox("Reliability at 100 hrs: " & r)