# Help with Fitting

**URL:** <https://discourse.pumas.ai/t/help-with-fitting/50>\
**Category:** Estimation\
**Created:** [October 17, 2019, 9:27pm UTC](https://discourse.pumas.ai/t/help-with-fitting/50 "2019-10-17T21:27:10Z")\
**Posts on this page:** 1\
**Showing post:** 40

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**Author:** ![vijay](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pumas.ai/vijay/32/96_2.png) [@vijay](https://discourse.pumas.ai/u/vijay)\
**Post date:** [November 19, 2019, 7:59pm UTC](https://discourse.pumas.ai/t/help-with-fitting/50/40 "2019-11-19T19:59:43Z")

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regarding `vpc` - [Not getting graph for VPC](https://discourse.pumas.ai/t/not-getting-graph-for-vpc/77/4)

regarding `infer(res)` -

1. did you get decent parameter estimates for your model?
2. `infer` is to compute the standard errors and confidence intervals, so I am not that surprised it is unable to compute for just two subjects? (as you removed one?)

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