Package index • ddfr

The `ddf` Class

ddf-class: An S4 class to represent a discrete distribution with finite support

ddf(): Create new ddf objects

ddf_from_frequencies(): Create new ddf objects from absolute frequencies

supp(): Get the support of a ddf object

probs(): Get the probabilities of a ddf object

desc(): Get the description of a ddf object

`desc<-`(): Set the description of a ddf object

`-`(<ddf>,<missing>): Multiply the support of a distribution with -1

shift(): Shift a distribution

Common Discrete Distributions

Distributions with Finite Support

benford(): Benford's law

bernoulli(): The Bernoulli distribution

beta_binomial(): The beta-binomial distribution

bin(): The binomial distribution

hypergeometric(): The hypergeometric distribution

negative_hypergeometric(): The negative hypergeometric distribution

rademacher(): The Rademacher distribution

unif(): The discrete uniform distribution

zipf(): The Zipf distribution

Distributions with Countably Infinite Support

geometric(): The geometric distribution

negative_bin(): The negative binomial distribution

pois(): The Poisson distribution

Analysing Properties of Distributions

Central Tendency

expected_value() mean(<ddf>): Calculate the expected value of distributions

medians(): Calculate medians of distributions

modes(): Calculate modes of distributions

Dispersion

standard_deviation(): Calculate the standard deviation of distributions

variance(): Calculate the variance of distributions

iqr(): Calculate the interquartile range of distributions

distribution_range(): Calculate the range of distributions

Moments

central_moment(): Calculate central moments of distributions

moment(): Calculate moments of distributions

standardized_moment(): Calculate standardized moments of distributions

skew(): Calculate the skewness of distributions

kurtosis(): Calculate the kurtosis of distributions

excess_kurtosis(): Calculate the excess kurtosis of distributions

Quantiles

decile(): Calculate deciles of distributions

percentile(): Calculate percentiles of distributions

quantiles(): Calculate quantiles of distributions

quartile(): Calculate quartiles of distributions

Other

entropy(): Calculate the entropy of distributions

report(): Generate a report for a distribution

Creating New Objects from Distributions

pmf(): Probability mass function

cdf(): Cumulative distribution function

samples(): Random samples from a distribution

Plotting

plot(<ddf>,<missing>): Plot a distribution

plot_cdf(): Plot the CDF of a distribution

plot_pmf(): Plot the PMF of a distribution

Convolutions

conv() `*`(<ddf>,<ddf>): Convolve two discrete distributions

conv_n(): Calculate the n-fold convolution of a distribution with itself

convolve_cpp(): Convolve two discrete distributions