A [[wp>probability density function]] describes the (lack of) knowledge for a parameter. Uncertain parameters can be assigned PDF’s and be included in a [[probabilistic simulation]].

Common probability density functions are 

  * [[wp>exponential distribution]]
  * [[wp>normal distribution]] and [[wp>log-normal distribution]]
  * [[wp>triangular distribution]]
  * [[wp>uniform distribution]]

PDF's are assigned to parameters in the [[parameters screen]] using the [[parameters screen#PDF editor]]. See [[https://userguide.intelligentscenariomodelling.com/doku.php?id=probability_density_function|probability density functions]] for a list of all PDF's. 

====See also====

  * [[Parameters screen]]