![]() ![]() Russel & Rao = a / (a + b + c + d) – Only existence is considered a match, but non-existence reduces the similarity. Kuckartz & Rädikers zeta = (2a + d) / (2a + b + c + d) – Existence is counted twice, non-existence once. Jaccard = a / (a + b + c) – Non-existence is completely ignored. Simple match = (a + d) / (a + b + c + d) – Both existence and non-existence are counted as a match. The calculation options differ in, among other things, the extent to which field “d”, or non-existence in both documents, is considered a match. All of the calculations are based on a four-field table of the following type that is generated for each paired combination of documents (in the background):Ī = Number of codes or variable values that are identical in both documents.ĭ = Number of codes or variable values that do not exist in both documents.ī and c = Number of codes or variable values that exist in only one document. To calculate similarity, various options are available. Similarity measures with the option “Existence of Code” You can add all activated codes directly via the Paste activated codes button.Įxistence of code – Generates a similarity matrix that considers only whether the selected codes occur in the document or not.Ĭode frequency – Generates a distance matrix that takes the distance of individual codes into consideration. In the upper section, you can add the codes you wish to include in the analysis. ![]()
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