Add definitions of common terms to the Glossary

[martinacantaro]

Goal
Building a useful Glossary with definitions of common terms, that can be linked to from the documents.

How to contribute

1. Pick a term from the list below, excluding those labeled in progress (those have already been picked)
2. Comment this issue to inform us that you are working on it.
3. Make a PR editing the docs/source/glossary.md file following this format
4. Include the following ID string in your PR title or commit message (this will help us keep track of it in Clickup): CU-5t5y0p

List of terms:

• Equidispersion (in progress)
• Underdispersion (in progress)
• Overdispersion (in progress)
• Generalized Poisson PMF (in progress)
• Bayes' theorem (in progress)
• Prior (in progress)
• Posterior (in progress)
• Markov Chain (MC) and Markov Chain Monte Carlo (MCMC) (in progress)
• Probability density (in progress)
• Probability mass
• Maximum a Posteriori (MAP)
• Maximum Likelihood Estimation (MLE) (in progress)
• No-U-Turn-Sampler (NUTS)
• Hamiltonian Monte Carlo
• Credibility
• Ordinary Differential Equation (ODE)
• Hierarchical Ordinary Differential Equation
• Generalized Linear Model (GLM) (in progress)

[itsguneetsingh]

This is my first time contributing to something open-source and I have this question that one might find really silly but I really have that problem. I am not able to find any directory named docs in this repository. Could you maybe help me?? Or do I have to make a directory named docs?

[Sayam753]

This docs directory is in pymc3 repo. Find the directory here.

[itsguneetsingh]

Okay, I'll start working on it. Also, what does "In progress" mean exactly mentioned in the issue

[martinacantaro]

Hi! Thank you for contributing @Guneetconvent2002 ! I hope your first open source contribution goes really well, let us know if you need any assistance.

I updated the description to add the details you pointed out.

"In progress" means somebody is already working on that definition, so pick any of the others!

[OriolAbril]

@Guneetconvent2002 In progress means someone is already working on that term. I'd recommend choosing 2-3 terms, commenting here which and then open a pr to pymc3 with the definitions.

You can use pymc-devs/pymc#4984 as an example of pr adding definitions to the glossary.

@ everyone this is also related to pymc-devs/pymc#4899 so we should probably close one of the two. This one has somewhat better explanation and is correctly labeled whereas the other one is in the right repo I think. @martinacantaro can you merge the two issues into one?

Also one extra comment which is whether the terms should be alphabetically sorted (excluding the two example ones that should be removed eventually)

[itsguneetsingh]

I'll be doing Equidispersion, Generalized poisson pmf, Bayes' theorem, Markov Chain (MC) and Markov Chain Monte Carlo (MCMC)

[martinacantaro]

Awesome! Updated them as "in progress"

[itsguneetsingh]

I have made a PR please have a look

[martinacantaro]

Hi! Following @OriolAbril's suggestion, I'm closing this issue and moving it to pymc-devs/pymc#4899

@Guneetconvent2002, I left some comments on your PR