# Analysis API

**URL:** <https://discourse.mc-stan.org/t/analysis-api/3486>\
**Category:** Developers\
**Created:** [March 6, 2018, 3:04pm UTC](https://discourse.mc-stan.org/t/analysis-api/3486 "2018-03-06T15:04:44Z")\
**Posts on this page:** 1\
**Showing post:** 55

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**Author:** ![syclik](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.mc-stan.org/syclik/32/6_2.png) [@syclik](https://discourse.mc-stan.org/u/syclik)\
**Post date:** [July 5, 2018, 1:55pm UTC](https://discourse.mc-stan.org/t/analysis-api/3486/55 "2018-07-05T13:55:19Z")

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> [@roualdes](#):
>
> How does everyone feel about starting an issue and then building out at least the C++ Analysis API for ess?

@roulades, please and thank you! That sounds great!

> [@betanalpha](#):
>
> Only hesitation I have is whether we require all of the chains concatenated into one vector as in this signature of do a vector of vectors for the chains.

The signature that @roualdes proposed is for multiple chains. Each chain’s draws are in a contiguous block of memory.

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