distributions3, inspired by the eponynmous Julia
package, provides a
generic function interface to probability distributions.
distributions3 has two goals:
pnorm(), etc, family of functions with S3
methods for distribution objects
Be extremely well documented and friendly for students in intro stat classes.
The main generics are:
random(): Draw samples from a distribution.
pdf(): Evaluate the probability density (or mass) at a point.
cdf(): Evaluate the cumulative probability up to a point.
quantile(): Determine the quantile for a given probability. Inverse of
You can install
You can install the development version with:
The basic usage of
distributions3 looks like:
library("distributions3") X <- Bernoulli(0.1) random(X, 10) #>  0 0 0 0 0 0 0 0 0 0 pdf(X, 1) #>  0.1 cdf(X, 0) #>  0.9 quantile(X, 0.5) #>  0
quantile() always returns lower tail probabilities. If
you aren’t sure what this means, please read the last several paragraphs
vignette("one-sample-z-confidence-interval") and have a gander at
If you are interested in contributing to
distributions3, please reach
out on Github! We are happy to review PRs contributing bug fixes.
Please note that
distributions3 is released with a Contributor Code
By contributing to this project, you agree to abide by its terms.
For a comprehensive overview of the many packages providing various distribution related functionality see the CRAN Task View.
distributionalprovides distribution objects as vectorized S3 objects
distr, but uses R6 objects
distris quite similar to
distributions, but uses S4 objects and is less focused on documentation.
fitdistrplusprovides extensive functionality for fitting various distributions but does not treat distributions themselves as objects
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