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Parameters for beta distribution from interpretable conditions

Parameters for beta distribution from interpretable conditions


Rather than knowing intrinsically what parameters are required for a distribution, scientists tend to have a sense of what value they expect a measure to take, how many observations should fall within a certain distance of that value.

For the normal distribution, this is straightforward, as the parameters reflect the expected value and variance. However, for the beta distribution, the parameters are not so readily interpretable.

parameterpal:: provides a means of obtaining the parameters required for the beta distribution from interpretable conditions.


devtools::install_github("softloud/parameterpal", build_vignettes = TRUE)

launch tutorial

After installation, the parameterpal:: tutorial will be available in
the Tutorial pane of Rstudio.

# executing this code will launch the tutorial in your browser
learnr::run_tutorial("ppalhelp", package = "parameterpal")


See this package’s
site for more information.

intended user

This package was developed for a friend and collaborator, computational
ecologist Dr Matthew Grainger, who
previously used browser-based tools to obtain beta parameters to inform
his rstats workflow. I hope he finds this package a useful augment to
his codeflow.


See vignette("betapal") for more information the same information,
but from the handy ease of your Rstudio Viewer pane.

Full disclosure, I need to update it after I fully understand this
gist I
was provided with after posting the first version of this software to
twitter. Open science at its best. Blogpost incoming on open science and
why it’s good to share bad math and beta research code. So cool I’ve
ended up with a better, more mathematically correct solution after
posting it.

other distributions

No reason the same math can’t be applied to other distributions. Open an
issue if you’d like me to provide parameters from interpretable
conditions for another distribution.