poisson_log cdfs #90

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1. syclik

   added

   feature

   new function

   on Jul 6, 2015
2. syclik commented on Jul 6, 2015

   

   syclik

   on Jul 6, 2015

   Last edited by bob-carpenter

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   From @betanalpha on April 29, 2015 14:6

   There’s no computational benefit to having inputs on the log scale for the CDFs as they’re typically given by transcendental functions and not amenable to the analytic simplifications the PDFs are.
3. syclik commented on Jul 6, 2015

   

   syclik

   on Jul 6, 2015

   Last edited by bob-carpenter

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   From @bob-carpenter on April 29, 2015 14:18

   Even if there's no computational benefit, it's conceptually cleaner to have them match, and it also allows people to write truncated models, as in:

     y ~ poisson_log(alpha) T[3,];
   

   So even a simple implementation in terms of just exp() transforming the alpha argument would be worth adding for convenience.
4. bob-carpenter

   added this to the v3.0.0This milestone has been deleted milestone on Aug 18, 2016
5. bob-carpenter

   self-assigned this

   on Aug 18, 2016
6. bob-carpenter

   assigned

   ghost

   and unassigned

   bob-carpenter

   on Oct 3, 2016
8. bob-carpenter commented on Oct 12, 2016

   

   bob-carpenter

   on Oct 12, 2016

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   The library should continue with the _log convention, then
   we'll change them all in one big pull request. The code
   generator isn't set up to understand built in _lpdfs yet.

   • Bob

   On Oct 12, 2016, at 3:46 PM, thelseraphim notifications@github.com wrote:

   Question: in the stan manual at E.6 it says we're moving from say, poisson_cdf_log to poisson_lcdf etc.

   It seems like this happened in the stan language as of 2.10 but not at all in the math library. Advice on how to proceed?

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9. serban-nicusor-toptal

   modified the milestones: 3.2.0, 3.2.0++ on Apr 22, 2020
10. serban-nicusor-toptal

    modified the milestones: 3.2.0++, 3.3.0++ on Jul 28, 2020
11. serban-nicusor-toptal

    modified the milestones: 3.3.0++, 3.4.0++ on Nov 3, 2020