fitting input distributions jake blanchard university of wisconsin - madison spring 2008

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Fitting Input Distributions Jake Blanchard University of Wisconsin - Madison Spring 2008

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Page 1: Fitting Input Distributions Jake Blanchard University of Wisconsin - Madison Spring 2008

Fitting Input Distributions

Jake BlanchardUniversity of Wisconsin - Madison

Spring 2008

Page 2: Fitting Input Distributions Jake Blanchard University of Wisconsin - Madison Spring 2008

IntroductionIf we have some data for an

uncertain input parameter, we need to decide what form of distribution to use as a model and then find a way to fit the model to the data.

Matlab has some tools (in the statistics toolbox) for this purpose

Other tools are BestFit (standalone or in @Risk) and Stat::Fit (standalone – free student version available)

Page 3: Fitting Input Distributions Jake Blanchard University of Wisconsin - Madison Spring 2008

Matlab Fitting ToolCreate data vectorThen open GUI fitting tool

◦dfittool

Page 4: Fitting Input Distributions Jake Blanchard University of Wisconsin - Madison Spring 2008
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Compare Weibull and Log-Norm