Group together similarly written words that may be spelled inconsistently
This transformation is useful when, for example, you have freeform text in a survey,
where people will refer to the same concept in many different ways.
This helps clean and tidy your data by providing a consistent representation of each concept.
Strength threshold: a factor in the [0,1] range to make the algorithm more or less sensitive. A value of 1 will merge all ocurrences, while a value closer to 0 will search for stronger correlation between the terms, thus being much more strict with the merging.