For a clinical study we needed a randomization table with the option to use unequal cell counts, e.g n = 8 for treatment 1 and 2 and n=12 for treatment 3 and 4. Using the R package by Kornelius Rohmeyer, I have written a little web app with Shiny.

You can run it online, or install it on your computer from my github repository.

Shiny app for crossover random design

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