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zward / Amua

An open source modeling framework
GNU General Public License v3.0
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Transitional probability using Weibull survival #48

Closed yangszuchun closed 4 years ago

yangszuchun commented 4 years ago

Excuse me! I have the lambda and gamma values (as well as the intercept and log(scale)) of Weibull survival, how to input the shape and scale parameters in your Weibull distribution to derive the transitional probability?

Thank you in advance!

zward commented 4 years ago

The Weibull distribution in Amua is based on equations 1 and 2 here: https://mathworld.wolfram.com/WeibullDistribution.html

There are a few different parameterizations though - how are you estimating the parameters? You should be able to convert them to match the functional form in the link above.
I would plot the distribution (Tools -> Plot Function): Weibull(x,a,b,f) and check the mean Weibull(a,b,E) to make sure you are converting the parameters correctly.

yangszuchun commented 4 years ago

Thank you for the reply! The problem has been solved. Your Plot Function are useful!