.. _variables-discrete_interval_uncertain-num_intervals:

"""""""""""""
num_intervals
"""""""""""""


Specify the number of intervals for each variable


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**Specification**

- *Alias:* None

- *Arguments:* INTEGERLIST

- *Default:* Equal apportionment of intervals among variables


**Description**


In Dakota, epistemic uncertainty analysis is performed using either interval estimation or Dempster-Shafer theory of evidence.
In these approaches, one does not assign a probability distribution to each uncertain input variable.
Rather, one divides each uncertain input variable into one or more
intervals. The input parameters are only known to occur within
intervals; nothing more is assumed. ``num_intervals`` specifies the
number of such intervals associated with each interval uncertain parameter.