{"id":31846,"date":"2025-03-10T08:31:31","date_gmt":"2025-03-10T08:31:31","guid":{"rendered":"https:\/\/www.seobility.net\/?post_type=wiki&#038;p=31846"},"modified":"2025-06-05T12:56:51","modified_gmt":"2025-06-05T12:56:51","slug":"WDF","status":"publish","type":"wiki","link":"https:\/\/www.seobility.net\/de\/wiki\/WDF","title":{"rendered":"WDF"},"content":{"rendered":"<h2><span id=\"Was_bedeutet_.22WDF.22.3F\" class=\"mw-headline\">Was bedeutet &#8222;WDF&#8220;?<\/span><\/h2>\n<p>Das K\u00fcrzel WDF steht f\u00fcr Within-document Frequency und bezeichnet die Gewichtung eines Wortes in Relation zu allen anderen Worten innerhalb eines Dokuments. Die Informationswissenschaft bedient sich zur Feststellung der WDF einer von Donna Harman entwickelten Formel, die Worten innerhalb eines Dokuments einen Gewichtungswert beimisst. Dabei gilt: Je h\u00e4ufiger ein Wort in einem Dokument enthalten ist, desto h\u00f6her ist die WDF dieses Wortes.<\/p>\n<p><b>Die Formel zur Berechnung der WDF lautet:<\/b><\/p>\n<p><img decoding=\"async\" src=\"\/de\/wiki\/images\/thumb\/b\/b6\/Formel_WDF.PNG\/300px-Formel_WDF.PNG\" srcset=\"\/de\/wiki\/images\/thumb\/b\/b6\/Formel_WDF.PNG\/450px-Formel_WDF.PNG 1.5x, \/de\/wiki\/images\/b\/b6\/Formel_WDF.PNG 2x\" alt=\"WDF Formel als Teil von WDF*IDF\" width=\"300\" height=\"63\" \/><\/p>\n<p>Freq(i,j) = H\u00e4ufigkeit von Term i in Dokument j (= <a title=\"Termfrequenz\" href=\"\/de\/wiki\/Termfrequenz\">Termfrequenz<\/a>)<\/p>\n<p>L<sub>j<\/sub> = Gesamtanzahl der Terme in Dokument j<\/p>\n<p>Erkl\u00e4rung zu &#8222;+1&#8220;: falls Freq(i,j) = 0 ist, kann mit dem &#8222;+1&#8220; erreicht werden, dass im Z\u00e4hler log2(1) = 0 steht.<\/p>\n<p><b>Beispiel<\/b><\/p>\n<p>In einem Dokument sind 12.000 W\u00f6rter enthalten (L= 12.000). Das Wort i wird in diesem Dokument 23 mal erw\u00e4hnt, also ist Freq(i,j)=23.<\/p>\n<p>Die Berechnung lautet beim Einsatz dieser Werte in die Formel: WDF = log<sub>2<\/sub>(23+1)\/log<sub>2<\/sub>(12000) = 0,3<\/p>\n<p>Der Gewichtungswert betr\u00e4gt hier im Ergebnis also WDF(i)= 0,3 (gerundet).<\/p>\n<h2><span id=\".C3.84hnliche_Artikel\" class=\"mw-headline\">\u00c4hnliche Artikel<\/span><\/h2>\n<ul>\n<li><a title=\"WDF*IDF\" href=\"\/de\/wiki\/wdf-idf\">WDF*IDF<\/a><\/li>\n<li><a title=\"Content is King\" href=\"\/de\/wiki\/Content_is_King\">Content is King<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Was bedeutet &#8222;WDF&#8220;? Das K\u00fcrzel WDF steht f\u00fcr Within-document Frequency und bezeichnet die Gewichtung eines Wortes in Relation zu allen anderen Worten innerhalb eines Dokuments. Die Informationswissenschaft bedient sich zur Feststellung der WDF einer von Donna Harman entwickelten Formel, die Worten innerhalb eines Dokuments einen Gewichtungswert beimisst. Dabei gilt: Je h\u00e4ufiger ein Wort in einem [&hellip;]<\/p>\n","protected":false},"author":38,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-31846","wiki","type-wiki","status-publish","hentry","wiki_categories-suchmaschinenoptimierung"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Was ist WDF? Definition und Formel - Seobility Wiki<\/title>\n<meta name=\"description\" content=\"WDF bezeichnet die Gewichtung eines Wortes in Relation zu allen anderen Worten innerhalb eines Dokuments. 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