Franzi2114

Extension operands_and_partials to 8 edges

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## Description As I want to add a function with 8 known partials to the stan-math library (#2682), I had to extend the `operands_and_partials` routine such that it can work...

Adding 7-Parameter Drift Diffusion Model (DDM) PDF with partial derivatives to Stan Math

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## Description The Drift Diffusion Model (DDM) introduced by Ratcliff provides a framework for analyzing data of fast binary decisions jointly modelling accuracy and response times. There are several parameterizations...

Feature/issue 2682 add 7 parameter ddm pdf

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## Summary We provide an implementation of the LPDF drift diffusion model with up to 7 parameters. There will be two new functions available in the stan::math namespace: `wiener_full_lpdf` and...

Adding 7-Parameter Drift Diffusion Model (DDM) CDF and CCDF with partial derivatives to Stan Math

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## Description As the PDF function for the 7-parameter diffusion model with its partial derivatives was implemented in issue #2682 and discussed in PR #2822, I now also want to...

Feature/issue 2966 add 7 parameter ddm cdf and ccdf

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## Summary With this PR the CDF and the CCDF of the 7-parameter diffuion model are added. See issue #2966 Relates to issue #2822 ## Tests We implemented analogous tests...