# Input distribution and data driven PCE

**URL:** <https://uqworld.org/t/input-distribution-and-data-driven-pce/511>\
**Category:** Community Q&A and How To\
**Tags:** pce, copulas, input\
**Created:** [February 19, 2020, 4:31am UTC](https://uqworld.org/t/input-distribution-and-data-driven-pce/511 "2020-02-19T04:31:21Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![bsudret](https://uqworld.org/user_avatar/uqworld.org/bsudret/32/224_2.png) [@bsudret](https://uqworld.org/u/bsudret)\
**Post date:** [April 15, 2020, 2:33pm UTC](https://uqworld.org/t/input-distribution-and-data-driven-pce/511/2 "2020-04-15T14:33:51Z")

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Hi

When setting up a UQ problem, you **have to** define what are your input distributions. Either by expert knowledge (e.g. selecting the distributions from the relevant literature), or to infer them from input data. In the latter case you should use the [inference module](https://www.uqlab.com/inference-user-manual) of UQLab with your data to produce the proper INPUT object.  
You may also refer to [this post](https://uqworld.org/t/how-to-define-my-probabilistic-input-distributions/131) for more detailed information.

Best regards  
Bruno

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