README.md

In tomicapretto/samp: A Shiny app to explore sampling distributions

samp

This package contains a Shiny app to visualize sampling distributions of several statistics. To install the package

# install.packages("remotes")
remotes::install_github("tomicapretto/samp")

And you just run the app with

samp::launch()

This is a simple demonstration of how you can use the app.

You can also see a live version of the app here.

Basic usage

The objective of this application is to enable people to explore sampling distributions of several statistics computed with samples coming from arbitrary mixtures of probability distributions.

Add distributions to the mixture.

Choose one distribution at a time from the input on the left panel and click on +. This will add the distribution to the mixture and insert inputs to tune its parameters as well as the weight it has in the mixture. You can repeat this process as many times as you want, adding a new distribution to the mixture in each time.

Tune sampling parameters

• Sample size is the number of draws we take from the (theoretical) mixture we construct. You can specify any integer number between 2 and 1000.
• Repetitions indicates how many times we repeat the sampling process. The larger this number the better the approximation of the empirical sampling distribution. This must be between 10 and 1000.
• Statistic determines what statistic we compute with the sampled values. Currently, these are the available options:
• Mean
• Median
• Minimum
• Maximum
• Percentile
• Percentile indicates which percentile we compute when we select Percentile option in Statistic.

Explore the charts

Just see the interactive charts and make up your conclusions!

Final notes

• Weights must add up to 1. A notification appears every time weights add up to something different than 1.
• I would like to improve how the app handles weights. Ideally I would like to write something that tunes the weights automatically so they sum 1 by default but allows the user to choose other values.
• Appart from better default weights, I don't think I will be adding many features to the app in the nearby feature.
• Want to contribute? Please do! I'm very open to any type of contribution (even if it is just a comment about something good/bad in the app).

tomicapretto/samp documentation built on Jan. 9, 2021, 3:22 p.m.