GoFrequencyAnalysis

A little package developed with Go to make frequency analysis on text

Data

First of all there is two structures Counter and Pair

Counter

Counter is a main structure, it contains the results and data about the text to be analysed.

type Counter struct {
	Text       string
	SizeText   int
	MappedKeys map[string]int
	Pairs      []Pair
}

The Text and its size are contained in it, but most importantly is MappedKeys and Pairs :

MappedKeys : will contain for each character the number of occurence in the text Pairs : see next section.

Pairs

The structure "Pair" is useful because it enables to match a character with how many time it occur and frequency of its apparition.

type Pair struct {
	Char  string
	Count int
	Freq  float32
}

How to use

So, to do some analysis you just need two things : a text and a counter which also contains your text. Here an example :

text := "beautiful text"

counter := Counter{Text: text} //Not needed to set the size of text

var freqAnalysis IFreqAnalysis = &counter

freqAnalysis.Analysis()

for _, pair := range counter.Pairs {
	test.Log(pair.Char, pair.Count, pair.Freq)
}
/*
 *Output:
 * t 3 21.428572
 * e 2 14.285715
 * u 2 14.285715
 * l 1 7.1428576
 *   1 7.1428576
 * b 1 7.1428576
 * a 1 7.1428576
 * i 1 7.1428576
 * f 1 7.1428576
 * x 1 7.1428576
 */

Method

Mapping()

Its a main method it map each character with its number of occurence

Sort()

Ensure that the most occur characters will be in the firt indexes in the Pairs array

Frequency()

Calculate the frequence for each character

Analysis()

Its a helper that execute three previous method see above (same order)