# Pm.traceplot not working when the observations are incomplete

**URL:** <https://discourse.pymc.io/t/pm-traceplot-not-working-when-the-observations-are-incomplete/7167>\
**Category:** Questions\
**Created:** [April 3, 2021, 7:55pm UTC](https://discourse.pymc.io/t/pm-traceplot-not-working-when-the-observations-are-incomplete/7167 "2021-04-03T19:55:55Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![OriolAbril](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/oriolabril/32/2497_2.png) [@OriolAbril](https://discourse.pymc.io/u/OriolAbril)\
**Post date:** [April 5, 2021, 6:36pm UTC](https://discourse.pymc.io/t/pm-traceplot-not-working-when-the-observations-are-incomplete/7167/9 "2021-04-05T18:36:05Z")

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I don’t really know much about the missing variable imputation internals. Maybe this talk helps better understand what is going on

> [@Partial Missing Multivariate Observation and What to Do With Them by Junpeng Lao](https://discourse.pymc.io/t/partial-missing-multivariate-observation-and-what-to-do-with-them-by-junpeng-lao/6050):
>
> Talk Abstract Missing value is pretty common in any real world data set. While PyMC3 provides convenient automatic imputation, how do we verify it works, especially dealing with multivariate observation with partially missing value? Come to this tutorial to find out! Junpeng Lao [Twitter @junpenglao](https://twitter.com/junpenglao)Talk [[Partial Missing Multivariate Observation and What to Do With Them (Junpeng Lao)] ](https://www.youtube.com/watch?v=nJ3XefApED0) All codes are here in this notebook: [[pymcon] Missing value handling.ipynb · Git…](https://gist.github.com/junpenglao/7c505c6c76f99c928a4e2c1161cff43a)

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