Dirichlet distributions
Meghan Kumar
I've built a decision tree with multiple payoffs for a health intervention that's running fine under deterministic conditions. There are a few nodes with 3-4 branches where I've used a Dirichlet distribution. When I run the Monte Carlo/PSA, it is getting stuck on my Dirichlet distributions and saying:
Error - Expression parsed but cannot be calculated.
Error while evaluating function dist: 0.026343597510009205 cannot be converted to integer
Calculating: Dist(Dist_healthy;1)
Unable to evaluate probability.
I've tried putting the definition both directly in the tree as well as in the variable definition but neither seems to work. As far as I can tell, it's defined correctly. Any suggestions?
Comments
If you refer to distributions by name rather than by index, you need to place quotes around the distribution name. Try changing your expression to Dist("Dist_healthy";1) and adjust other expressions in the same way.
Andrew
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