17.1.7.2 Algorithm (Discrete Frequency)

The data consists of a sample of n observations of a discrete variable, denoted by\(x_i\,\!\), fori=1,...,n. Then sort the data ascending, the ordered data is denoted by\(x_{(i)}\,\!\), fori=1,...,n. The corresponding count of the value \(x_{(i)}\,\!\) is denoted by\(c_i\,\!\), , which is the frequency of the ith value. The relative frequency and cumulative frequency of \(x_{(i)}\,\!\) are calculated as follows:

\(RelativeFrequency=c_k/n\,\!\) and \(CumulativeFrequency_k=\sum_{k=1}^N{c_i}/n\,\!\), for k=1,...,n.