{"id":5618,"date":"2025-07-15T13:34:45","date_gmt":"2025-07-15T13:34:45","guid":{"rendered":"https:\/\/functiontranslator.com\/ifna\/"},"modified":"2021-02-26T09:56:49","modified_gmt":"2021-02-26T09:56:49","slug":"ifna","status":"publish","type":"post","link":"https:\/\/functiontranslator.com\/cs\/ifna\/","title":{"rendered":"IFNA"},"content":{"rendered":"

Pou\u017eit\u00ed funkce IFNA pro pr\u00e1ci s hodnotami NA<\/h2>\n

Funkce IFNA je v aplikac\u00edch Microsoft Excel a Google Sheets velmi u\u017eite\u010dn\u00fdm n\u00e1strojem pro efektivn\u00ed zpracov\u00e1n\u00ed chybov\u00fdch hodnot NA. Tento n\u00e1vod poskytuje p\u0159ehled o tom, jak tuto funkci vyu\u017e\u00edt k identifikaci a nahrazen\u00ed hodnot NA v situac\u00edch, kdy standardn\u00ed v\u00fdpo\u010dty nebo funkce vracej\u00ed tuto chybovou hodnotu.<\/p>\n

Syntax a p\u0159\u00edklady<\/h2>\n

Syntaxe funkce IFNA je n\u00e1sleduj\u00edc\u00ed:<\/p>\n

IFNA(v\u00fdraz, alternativa)<\/code><\/pre>\n
Kde:<\/p>\n
    \n
  • v\u00fdraz<\/strong> – v\u00fdraz nebo funkce, kter\u00e1 m\u016f\u017ee vr\u00e1tit hodnotu NA<\/li>\n
  • alternativa<\/strong> – hodnota, kter\u00e1 se m\u00e1 vr\u00e1tit, pokud je v\u00fdsledek v\u00fdrazu hodnota NA<\/li>\n<\/ul>\n
    P\u0159\u00edklad pou\u017eit\u00ed:<\/p>\n
    =IFNA(VLOOKUP(\"apple\", A1:B10, 2, FALSE), \"Nezn\u00e1m\u00e9 ovoce\")<\/code><\/pre>\n
    Ve v\u00fd\u0161e uveden\u00e9m p\u0159\u00edkladu funkce VLOOKUP hled\u00e1 term\u00edn „apple“ v rozsahu A1:B10. Pokud term\u00edn nen\u00ed nalezen a VLOOKUP vr\u00e1t\u00ed hodnotu NA, na m\u00edsto t\u00e9to hodnoty se zobraz\u00ed „Nezn\u00e1m\u00e9 ovoce“.<\/p>\n
    Praktick\u00e9 vyu\u017eit\u00ed<\/h2>\n
    P\u0159\u00edklad 1: \u0158e\u0161en\u00ed chyb\u011bj\u00edc\u00edch dat u emailov\u00fdch adres<\/h2>\n
    P\u0159edstavte si, \u017ee m\u00e1te seznam zam\u011bstnanc\u016f s jejich emailov\u00fdmi adresami, ale n\u011bkter\u00e9 adresy chyb\u00ed a jsou reprezentov\u00e1ny hodnotou NA. Chcete vytvo\u0159it seznam, kde budou m\u00edsto hodnot NA uvedeny texty „Email nen\u00ed dostupn\u00fd“.<\/p>\n
    =IFNA(VLOOKUP(\"Jan Nov\u00e1k\", A1:B10, 2, FALSE), \"Email nen\u00ed dostupn\u00fd\")<\/code><\/pre>\n
    V tomto p\u0159\u00edkladu, pokud je emailov\u00e1 adresa Jana Nov\u00e1ka nezn\u00e1m\u00e1 (hodnota NA), funkce vr\u00e1t\u00ed „Email nen\u00ed dostupn\u00fd“.<\/p>\n
    P\u0159\u00edklad 2: V\u00fdpo\u010det pr\u016fm\u011br\u016f v datasech obsahuj\u00edc\u00edch hodnoty NA<\/h2>\n
    P\u0159i v\u00fdpo\u010dtu pr\u016fm\u011br\u016f v datasetech, kde jsou p\u0159\u00edtomny hodnoty NA, mohou tyto hodnoty v\u00fdsledek zkreslit. Pro z\u00edsk\u00e1n\u00ed pr\u016fm\u011bru bez t\u011bchto chybov\u00fdch hodnot m\u016f\u017eete pou\u017e\u00edt n\u00e1sleduj\u00edc\u00ed p\u0159\u00edstup:<\/p>\n
    =IFNA(AVERAGE(A1:A10), \"Data nejsou k dispozici\")<\/code><\/pre>\n
    Zde funkce AVERAGE vypo\u010d\u00edt\u00e1 pr\u016fm\u011br hodnot v rozsahu A1:A10. Pokud by v\u0161echny hodnoty byly NA, jako v\u00fdsledek se zobraz\u00ed „Data nejsou k dispozici“.<\/p>\n
    D\u00edky funkc\u00edm jako IFNA m\u016f\u017eete ve sv\u00fdch datov\u00fdch anal\u00fdz\u00e1ch v Excelu a Google Sheets dos\u00e1hnout v\u011bt\u0161\u00ed p\u0159ehlednosti a u\u017eitkovosti.<\/p>\n","protected":false},"excerpt":{"rendered":"
    Pokud je v\u00fdsledkem vzorce chybov\u00e1 hodnota #NEN\u00cd_K_DISPOZICI, vr\u00e1t\u00ed tato funkce hodnotu, kter\u00e1 j\u00ed byla zad\u00e1na V opa\u010dn\u00e9m p\u0159\u00edpad\u011b vr\u00e1t\u00ed v\u00fdsledek vzorce<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[285],"tags":[],"class_list":["post-5618","post","type-post","status-publish","format-standard","hentry","category-logicke"],"acf":[],"yoast_head":"\nFunkce IFNA v Excelu: jak funguje, primjeri kori\u0161tenja formule<\/title>\n<meta name=\"description\" content=\"Opis funkcije IFNA u Excelu i Google tablicama. 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