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| en:pojmy:frekvence [2016/12/12 18:29] – [Související odkazy] veronikapojarova | en:pojmy:frekvence [2016/12/12 18:34] – [Dispersion of phenomena] veronikapojarova |
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| ===== Dispersion of phenomena ===== | ===== Dispersion of phenomena ===== |
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| In some cases it is necessary to supplement absolute or relative frequency with information about the dispersion of the given phenomenon throughout the text/corpus. Even phenomena which are relatively very frequent can appear only in a limited circle of texts or in certain parts of the document. In such cases, the frequency itself can be an unreliable indicator of conventionality. In order to quantify the uneven distribution of words in corpora, various measures of dispersion are used, the most simple of which are based on counting the number of documents in which the unit appears, or authors who used it. Sofistikovanější způsoby zjišťování disperze prostředků využívají průměrných dílčích frekvencí v rámci jednotlivých úseků textu/korpusu, příp. počítání variačního koeficientu, tedy poměru směrodatné odchylky frekvencí v jednotlivých částech k průměru těchto dílčích frekvencí (např. Juillandův koeficient D, srov. též [[pojmy:arf|ARF]]). | In some cases it is necessary to supplement absolute or relative frequency with information about the dispersion of the given phenomenon throughout the text/corpus. Even phenomena which are relatively very frequent can appear only in a limited circle of texts or in certain parts of the document. In such cases, the frequency itself can be an unreliable indicator of conventionality. In order to quantify the uneven distribution of words in corpora, various measures of dispersion are used, the most simple of which are based on counting the number of documents in which the unit appears, or authors who used it. More sophisticated ways of obtaining information about dispersion include using average partial frequencies within individual sections of the text/corpus, or calculating the variation coefficient i.e. the ratio of the standard deviation of frequencies in the individual sections to the average of these partial frequencies (e.g. Juilland's D coefficient, see also [[en:pojmy:arf|ARF]]). |
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| ==== Related links ==== | ==== Related links ==== |
