{"id":3480,"date":"2023-07-17T06:35:01","date_gmt":"2023-07-17T06:35:01","guid":{"rendered":"https:\/\/statorials.org\/tr\/r-kosulu-iceren-sutundaki-degerleri-sayar\/"},"modified":"2023-07-17T06:35:01","modified_gmt":"2023-07-17T06:35:01","slug":"r-kosulu-iceren-sutundaki-degerleri-sayar","status":"publish","type":"post","link":"https:\/\/statorials.org\/tr\/r-kosulu-iceren-sutundaki-degerleri-sayar\/","title":{"rendered":"C: ko\u015fullu bir s\u00fctundaki de\u011ferler nas\u0131l say\u0131l\u0131r?"},"content":{"rendered":"

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Belirli bir ko\u015fula sahip R’deki bir veri \u00e7er\u00e7evesinin bir s\u00fctunundaki de\u011ferlerin say\u0131s\u0131n\u0131 saymak i\u00e7in a\u015fa\u011f\u0131daki y\u00f6ntemleri kullanabilirsiniz:<\/span><\/p>\n

Y\u00f6ntem 1: Ko\u015fullu bir s\u00fctundaki de\u011ferleri say\u0131n<\/strong><\/span><\/p>\n

 nrow(df[df$column1 == ' value1<\/span> ', ])\n<\/strong><\/pre>\n
 Y\u00f6ntem 2: Ko\u015fullu birden \u00e7ok s\u00fctundaki de\u011ferleri say\u0131n<\/strong><\/span><\/p>\n
 nrow(df[df$column1 == ' value1<\/span> ' &<\/span> df$column2 == ' value2<\/span> ', ])<\/strong><\/pre>\n
 A\u015fa\u011f\u0131daki \u00f6rnekler, R’deki a\u015fa\u011f\u0131daki veri \u00e7er\u00e7evesiyle her y\u00f6ntemin pratikte nas\u0131l kullan\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n
 #create data frame\n<\/span>df <- data. frame<\/span> (team=c('A', 'A', 'A', 'A', 'B', 'B', 'B', 'B'),\n                 position=c('G', 'G', 'F', 'F', 'G', 'G', 'F', 'F'),\n                 points=c(10, 12, 3, 14, 22, 15, 17, 17))\n\n#view data frame\n<\/span>df\n\n  team position points\n1 AG 10\n2 AG 12\n3 AF 3\n4 AF 14\n5 BG 22\n6 BG 15\n7 BF 17\n8 BF 17\n<\/b><\/span><\/pre>\n
 \u00d6rnek 1: Ko\u015fullu bir s\u00fctundaki de\u011ferleri say\u0131n<\/strong><\/span><\/h2>\n
 A\u015fa\u011f\u0131daki kod, tak\u0131m<\/strong> s\u00fctunundaki de\u011ferin ‘ A’ya<\/strong> e\u015fit oldu\u011fu de\u011ferlerin say\u0131s\u0131n\u0131n nas\u0131l say\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n
 #count number of rows where team is equal to 'B'\nnrow(df[df$team == ' B<\/span> ', ])<\/span>\n\n[1] 4<\/span><\/span><\/strong><\/pre>\n
 Tak\u0131m<\/strong> s\u00fctununda de\u011ferin \u201cB\u201dye e\u015fit oldu\u011fu 4<\/strong> de\u011ferin bulundu\u011funu g\u00f6rebiliriz.<\/span><\/p>\n
 \u00d6rnek 2: Ko\u015fullu birden \u00e7ok s\u00fctundaki de\u011ferleri say\u0131n<\/strong><\/span><\/h2>\n
 A\u015fa\u011f\u0131daki kod, tak\u0131m<\/strong> s\u00fctununun “B”ye ve konum<\/strong> s\u00fctununun “F”ye e\u015fit oldu\u011fu veri \u00e7er\u00e7evesindeki sat\u0131r say\u0131s\u0131n\u0131n nas\u0131l say\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n
 #count number of rows where team is equal to 'B' and position is equal to 'F'\nnrow(df[df$team == ' B<\/span> ' &<\/span> df$position == ' F<\/span> ', ])\n<\/span>\n[1] 2<\/span><\/span><\/strong><\/pre>\n
 Veri \u00e7er\u00e7evesinde bu ko\u015fullar\u0131n her ikisini de kar\u015f\u0131layan 2<\/strong> sat\u0131r\u0131n oldu\u011funu g\u00f6rebiliriz.<\/span><\/p>\n
 \u0130stenilen say\u0131da ko\u015fulu kar\u015f\u0131layan sat\u0131r say\u0131s\u0131n\u0131 saymak i\u00e7in benzer s\u00f6z dizimini kullanabiliriz.<\/span><\/p>\n
 \u00d6rne\u011fin a\u015fa\u011f\u0131daki kod, \u00fc\u00e7 ko\u015fulu kar\u015f\u0131layan sat\u0131r say\u0131s\u0131n\u0131n nas\u0131l say\u0131laca\u011f\u0131n\u0131 g\u00f6sterir:<\/span><\/p>\n