Improper message when sample size is increased RRS feed

  • Question

  • In the DifficultyAbility example if I increase the sample size (number of subjects) to something like 400 I get 

    MicrosoftResearch.Infer.Factors.ImproperMessageException: 'Improper distribution during inference (Gaussian(m/v=-0.002391, 1/v=0)).  Cannot perform inference on this model.'

    on the IsPositiveOp_Proper 

    This seems rather dissappointing, is there anything that can be adjusted to avoid this? +

    Friday, September 29, 2017 1:33 PM


  • Yes, you can sharpen the prior on discrimination, or observe it to a known value.
    • Marked as answer by cyentist Monday, October 2, 2017 3:06 PM
    Friday, September 29, 2017 6:08 PM