# Help with factor analysis (latent variable model)

**URL:** <https://discourse.mc-stan.org/t/help-with-factor-analysis-latent-variable-model/3923>\
**Category:** Modeling\
**Tags:** specification\
**Created:** [April 19, 2018, 2:49pm UTC](https://discourse.mc-stan.org/t/help-with-factor-analysis-latent-variable-model/3923 "2018-04-19T14:49:29Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![bbbales2](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/bbbales2/32/77_2.png) [@bbbales2](https://discourse.mc-stan.org/u/bbbales2)\
**Post date:** [April 19, 2018, 5:07pm UTC](https://discourse.mc-stan.org/t/help-with-factor-analysis-latent-variable-model/3923/6 "2018-04-19T17:07:27Z")

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Nevermind, ignore this, I’m super wrong.

The eigenvalues of L would be positive, but not necessarily LL^T.

Check L =  
[1, 0;  
-5, 1]

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