{"id":5617,"date":"2025-07-15T13:34:45","date_gmt":"2025-07-15T13:34:45","guid":{"rendered":"https:\/\/functiontranslator.com\/iferror\/"},"modified":"2021-02-26T09:56:47","modified_gmt":"2021-02-26T09:56:47","slug":"iferror","status":"publish","type":"post","link":"https:\/\/functiontranslator.com\/cs\/iferror\/","title":{"rendered":"IFERROR"},"content":{"rendered":"

\u00davod do kontroly chyb<\/h2>\n

Funkce pro o\u0161et\u0159en\u00ed chyb je nezbytn\u00fdm n\u00e1strojem v aplikac\u00edch jako Microsoft Excel a Google Sheets. Umo\u017e\u0148uje u\u017eivatel\u016fm \u0159e\u0161it chyby, kter\u00e9 mohou vzniknout p\u0159i v\u00fdpo\u010dtech nebo manipulaci s daty, poskytov\u00e1n\u00edm alternativn\u00edch v\u00fdstup\u016f, pokud standardn\u00ed funkce selh\u00e1vaj\u00ed. D\u00edky t\u00e9to funkci m\u016f\u017eeme udr\u017eet na\u0161e listy \u010dist\u00e9 a p\u0159ehledn\u00e9, bez pot\u0159eby zobrazov\u00e1n\u00ed b\u011b\u017en\u00fdch chybov\u00fdch hl\u00e1\u0161en\u00ed jako #DIV\/0!, #N\/A a dal\u0161\u00ed.<\/p>\n

Detailn\u00ed popis a syntaxe<\/h2>\n

Syntaxe t\u00e9to funkce je ve v\u0161ech aplikac\u00edch velmi podobn\u00e1 a m\u016f\u017eeme ji uv\u00e9st n\u00e1sledovn\u011b:<\/p>\n

=IFERROR(hodnota, hodnota_if_error)<\/code><\/pre>\n
    \n
  • hodnota<\/b> – V\u00fdraz nebo odkaz na bu\u0148ku, kter\u00fd je vyhodnocen. Pokud vyhodnocen\u00ed nevede k chyb\u011b, je dan\u00e1 hodnota vr\u00e1cena jako v\u00fdsledek.<\/li>\n
  • hodnota_if_error<\/b> – Hodnota, kter\u00e1 je vr\u00e1cena v p\u0159\u00edpad\u011b, \u017ee vyhodnocen\u00ed prvn\u00edho argumentu odhal\u00ed chybu.<\/li>\n<\/ul>\n
    P\u0159\u00edklad pou\u017eit\u00ed funkce ve va\u0161em listu m\u016f\u017ee vypadat takto:<\/p>\n
    =IFERROR(A1\/B1, \"Chyba p\u0159i d\u011blen\u00ed\")<\/code><\/pre>\n
    V tomto p\u0159\u00edpad\u011b, pokud d\u011blen\u00ed bu\u0148ky A1 bu\u0148kou B1 vyvol\u00e1 chybu (nap\u0159\u00edklad d\u011blen\u00ed nulou), zobraz\u00ed se m\u00edsto chybov\u00e9ho k\u00f3du text „Chyba p\u0159i d\u011blen\u00ed“.<\/p>\n
    Praktick\u00e9 vyu\u017eit\u00ed ve skute\u010dn\u00fdch situac\u00edch<\/h2>\n
    Zde jsou dva praktick\u00e9 p\u0159\u00edklady pou\u017eit\u00ed funkce pro o\u0161et\u0159en\u00ed chyb, kter\u00e9 ilustruj\u00ed, jak efektivn\u00ed m\u016f\u017ee b\u00fdt tento n\u00e1stroj pro ka\u017edodenn\u00ed pr\u00e1ci s tabulkov\u00fdm editorem.<\/p>\n
    Prvn\u00ed p\u0159\u00edklad: V\u00fdpo\u010det pr\u016fm\u011bru s mo\u017en\u00fdmi chyby<\/h2>\n
    P\u0159ed aplikac\u00ed funkce pr\u016fm\u011bru na \u0159adu dat m\u016f\u017eeme ov\u011b\u0159it, zda n\u011bkter\u00e9 hodnoty nezp\u016fsobuj\u00ed chybu:<\/p>\n
    =IFERROR(AVERAGE(A1:A10), \"Nelze vypo\u010d\u00edtat pr\u016fm\u011br\")<\/code><\/pre>\n
    V tomto p\u0159\u00edkladu funkce vr\u00e1t\u00ed pr\u016fm\u011br hodnot z bun\u011bk A1 do A10. V p\u0159\u00edpad\u011b, \u017ee se v rozsahu nach\u00e1zej\u00ed chybn\u00e9 hodnoty (nap\u0159. text m\u00edsto \u010d\u00edsel), vr\u00e1t\u00ed m\u00edsto toho text „Nelze vypo\u010d\u00edtat pr\u016fm\u011br“.<\/p>\n
    Druh\u00fd p\u0159\u00edklad: Bezpe\u010dn\u00e9 z\u00edsk\u00e1v\u00e1n\u00ed dat z extern\u00edch zdroj\u016f<\/h2>\n
    P\u0159i pr\u00e1ci s daty importovan\u00fdmi z extern\u00edch zdroj\u016f se m\u016f\u017eeme setkat s situacemi, kdy jsou data ne\u00fapln\u00e1 nebo po\u0161kozen\u00e1, co\u017e vede k chyb\u00e1m. V takov\u00e9m p\u0159\u00edpad\u011b m\u016f\u017eeme postupovat takto:<\/p>\n
    =IFERROR(VLOOKUP(\"kl\u00ed\u010d\", A1:B10, 2, FALSE), \"Data nebyla nalezena\")<\/code><\/pre>\n
    V tomto p\u0159\u00edkladu se pokus\u00edme nal\u00e9zt hodnotu odpov\u00eddaj\u00edc\u00ed „kl\u00ed\u010di“ v rozsahu A1:B10. Pokud kl\u00ed\u010d neexistuje a dojde k chyb\u011b, zobraz\u00ed se m\u00edsto chybov\u00e9ho ozn\u00e1men\u00ed #N\/A text „Data nebyla nalezena“.<\/p>\n
    Tyto p\u0159\u00edklady ukazuj\u00ed, jak funkce pro o\u0161et\u0159en\u00ed chyb umo\u017e\u0148uje efektivn\u00ed a hladk\u00e9 zpracov\u00e1n\u00ed dat bez nutnosti manu\u00e1ln\u00edho z\u00e1sahu p\u0159i ka\u017ed\u00e9 chyb\u011b.<\/p>\n","protected":false},"excerpt":{"rendered":"
    Pokud je vzorec vyhodnocen jako chyba, vr\u00e1t\u00ed zadanou hodnotu 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-5617","post","type-post","status-publish","format-standard","hentry","category-logicke"],"acf":[],"yoast_head":"\nFunkce IFERROR v Excelu: jak funguje, primjeri kori\u0161tenja formule<\/title>\n<meta name=\"description\" content=\"Opis funkcije IFERROR u Excelu i Google tablicama. 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