Plot pdf of discrete univariate distributions in documentation

[arnaud-ma]

The plots were already in place for continuous distributions but not for discrete ones.

I simply replaced plot with stem, the xlabel and the ylabel.

I also tried to select examples that highlight the characteristics of each (asymmetry, etc.).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.76%. Comparing base (050e0f9) to head (d6092ae).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

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  Coverage   86.76%   86.76%           
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  Files         149      149           
  Lines        8888     8888           
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  Hits         7712     7712           
  Misses       1176     1176           

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[devmotion]

Can you show how it looks? Previews are not deployed for PRs from forks.

[arnaud-ma]

Yes, here: https://arnaud-ma.github.io/Distributions.jl/dev/univariate/#Discrete-Distributions

[devmotion]

Make this a common option in _plotdensity above?

[arnaud-ma]

linewidth argument is not doing anything on GR.stem. I don't really know why, the documentation of GR is quite obscure (https://gr-framework.org/julia-jlgr.html).

So I guess linewidth only makes sense when it is a line plot, so only for continuous distributions.

[devmotion]

Hmm, but clearly the lines of the stem plot are thinner.