{"id":2237,"date":"2023-07-23T03:12:45","date_gmt":"2023-07-23T03:12:45","guid":{"rendered":"https:\/\/statorials.org\/pl\/ekstrakt-z-pand-miesiac-od-daty\/"},"modified":"2023-07-23T03:12:45","modified_gmt":"2023-07-23T03:12:45","slug":"ekstrakt-z-pand-miesiac-od-daty","status":"publish","type":"post","link":"https:\/\/statorials.org\/pl\/ekstrakt-z-pand-miesiac-od-daty\/","title":{"rendered":"Jak wyodr\u0119bni\u0107 miesi\u0105c z daty w pandach (z przyk\u0142adami)"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Aby wyodr\u0119bni\u0107 miesi\u0105c z daty w pandach, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej podstawowej sk\u0142adni:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>df[' <span style=\"color: #ff0000;\">month<\/span> '] = pd. <span style=\"color: #3366ff;\">DatetimeIndex<\/span> (df[' <span style=\"color: #ff0000;\">date_column<\/span> ']). <span style=\"color: #3366ff;\">month\n<\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Poni\u017cszy przyk\u0142ad pokazuje, jak w praktyce wykorzysta\u0107 t\u0119 funkcj\u0119.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Przyk\u0142ad: wyodr\u0119bnij miesi\u0105c z daty w Pandach<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Za\u0142\u00f3\u017cmy, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 DataFrame pand:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n\n<span style=\"color: #008080;\">#createDataFrame\n<span style=\"color: #000000;\">df = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ({' <span style=\"color: #ff0000;\">sales_date<\/span> ': ['2020-01-18', '2020-02-20', '2020-03-21'],\n                   ' <span style=\"color: #ff0000;\">total_sales<\/span> ': [675, 500, 575]})\n\n<span style=\"color: #008080;\">#view DataFrame\n<\/span><span style=\"color: #008000;\">print<\/span> (df)\n\n   sales_date total_sales\n0 2020-01-18 675\n1 2020-02-20 500\n2 2020-03-21 575\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Mo\u017cemy u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby utworzy\u0107 now\u0105 kolumn\u0119 zawieraj\u0105c\u0105 <strong>miesi\u0105c<\/strong> kolumny \u201edata_sprzeda\u017cy\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#extract month as new column\n<span style=\"color: #000000;\">df[' <span style=\"color: #ff0000;\">month<\/span> '] = pd. <span style=\"color: #3366ff;\">DatetimeIndex<\/span> (df[' <span style=\"color: #ff0000;\">sales_date<\/span> ']). <span style=\"color: #3366ff;\">month\n<\/span>\n<span style=\"color: #008080;\">#view updated DataFrame<\/span>\n<span style=\"color: #008000;\">print<\/span> (df)\n\n\tsales_date total_sales month\n0 2020-01-18 675 1\n1 2020-02-20 500 2\n2 2020-03-21 575 3<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Mo\u017cemy r\u00f3wnie\u017c u\u017cy\u0107 nast\u0119puj\u0105cej sk\u0142adni, aby utworzy\u0107 now\u0105 kolumn\u0119 zawieraj\u0105c\u0105 <strong>rok<\/strong> kolumny \u201edata_sprzeda\u017cy\u201d:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#extract year as new column\n<span style=\"color: #000000;\">df[' <span style=\"color: #ff0000;\">year<\/span> '] = pd. <span style=\"color: #3366ff;\">DatetimeIndex<\/span> (df[' <span style=\"color: #ff0000;\">sales_date<\/span> ']). <span style=\"color: #3366ff;\">year\n\n<\/span><span style=\"color: #008080;\">#view updated DataFrame<\/span>\n<span style=\"color: #008000;\">print<\/span> (df)\n\n        sales_date total_sales month year\n0 2020-01-18 675 1 2020\n1 2020-02-20 500 2 2020\n2 2020-03-21 575 3 2020<\/span>\n<\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Nale\u017cy pami\u0119ta\u0107, \u017ce je\u015bli w DataFrame znajduj\u0105 si\u0119 warto\u015bci NaN, funkcja ta automatycznie wygeneruje warto\u015bci NaN dla odpowiednich warto\u015bci w nowych kolumnach miesi\u0105ca i roku.<\/span><\/p>\n<p> <span style=\"color: #000000;\"><strong>Powi\u0105zane:<\/strong> <a href=\"https:\/\/statorials.org\/pl\/pandy-sortuja-wed\u0142ug-daty\/\" target=\"_blank\" rel=\"noopener\">Jak sortowa\u0107 ramk\u0119 danych Pandy wed\u0142ug daty<\/a><\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Dodatkowe zasoby<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Poni\u017csze samouczki wyja\u015bniaj\u0105, jak wykonywa\u0107 inne typowe operacje na pandach:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/pl\/pandy-zliczaja-okreslona-wartosc-w-kolumnie\/\" target=\"_blank\" rel=\"noopener\">Pandy: jak liczy\u0107 wyst\u0105pienia okre\u015blonej warto\u015bci w kolumnie<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/pandy-otrzymuja-indeks-wiersza\/\" target=\"_blank\" rel=\"noopener\">Pandy: pobierz indeks wierszy, kt\u00f3rych kolumna odpowiada warto\u015bci<\/a><br \/> <a href=\"https:\/\/statorials.org\/pl\/pandy-licza-brakujace-wartosci\/\" target=\"_blank\" rel=\"noopener\">Pandy: Jak policzy\u0107 brakuj\u0105ce warto\u015bci w DataFrame<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Aby wyodr\u0119bni\u0107 miesi\u0105c z daty w pandach, mo\u017cesz u\u017cy\u0107 nast\u0119puj\u0105cej podstawowej sk\u0142adni: df[&#8217; month &#8217;] = pd. DatetimeIndex (df[&#8217; date_column &#8217;]). month Poni\u017cszy przyk\u0142ad pokazuje, jak w praktyce wykorzysta\u0107 t\u0119 funkcj\u0119. Przyk\u0142ad: wyodr\u0119bnij miesi\u0105c z daty w Pandach Za\u0142\u00f3\u017cmy, \u017ce mamy nast\u0119puj\u0105c\u0105 ramk\u0119 DataFrame pand: import pandas as pd #createDataFrame df = pd. DataFrame ({&#8217; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2237","post","type-post","status-publish","format-standard","hentry","category-przewodnik"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Jak wyodr\u0119bni\u0107 miesi\u0105c z daty w Pandach (z przyk\u0142adami) - Statorials<\/title>\n<meta name=\"description\" content=\"W tym samouczku wyja\u015bniono, jak wyodr\u0119bni\u0107 miesi\u0105c z daty w ramce DataFrame pandy, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/pl\/ekstrakt-z-pand-miesiac-od-daty\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak wyodr\u0119bni\u0107 miesi\u0105c z daty w Pandach (z przyk\u0142adami) - Statorials\" \/>\n<meta property=\"og:description\" content=\"W tym samouczku wyja\u015bniono, jak wyodr\u0119bni\u0107 miesi\u0105c z daty w ramce DataFrame pandy, podaj\u0105c kilka przyk\u0142ad\u00f3w.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/pl\/ekstrakt-z-pand-miesiac-od-daty\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-23T03:12:45+00:00\" \/>\n<meta name=\"author\" content=\"Benjamin Anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"Benjamin Anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/pl\/ekstrakt-z-pand-miesiac-od-daty\/\",\"url\":\"https:\/\/statorials.org\/pl\/ekstrakt-z-pand-miesiac-od-daty\/\",\"name\":\"Jak wyodr\u0119bni\u0107 miesi\u0105c z daty w Pandach (z przyk\u0142adami) - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/pl\/#website\"},\"datePublished\":\"2023-07-23T03:12:45+00:00\",\"dateModified\":\"2023-07-23T03:12:45+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\"},\"description\":\"W tym samouczku wyja\u015bniono, jak wyodr\u0119bni\u0107 miesi\u0105c z daty w ramce DataFrame pandy, podaj\u0105c kilka przyk\u0142ad\u00f3w.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/pl\/ekstrakt-z-pand-miesiac-od-daty\/#breadcrumb\"},\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/pl\/ekstrakt-z-pand-miesiac-od-daty\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/pl\/ekstrakt-z-pand-miesiac-od-daty\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Dom\",\"item\":\"https:\/\/statorials.org\/pl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Jak wyodr\u0119bni\u0107 miesi\u0105c z daty w pandach (z przyk\u0142adami)\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/pl\/#website\",\"url\":\"https:\/\/statorials.org\/pl\/\",\"name\":\"Statorials\",\"description\":\"Tw\u00f3j przewodnik po kompetencjach statystycznych!\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/pl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"pl-PL\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/6484727a4612df3e69f016c3129c6965\",\"name\":\"Benjamin Anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pl-PL\",\"@id\":\"https:\/\/statorials.org\/pl\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"https:\/\/statorials.org\/pl\/wp-content\/uploads\/2023\/11\/Benjamin-Anderson-96x96.jpg\",\"caption\":\"Benjamin Anderson\"},\"description\":\"Cze\u015b\u0107, jestem Benjamin i jestem emerytowanym profesorem statystyki, kt\u00f3ry zosta\u0142 oddanym nauczycielem Statorials. 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