{"id":4345,"date":"2024-10-20T12:15:50","date_gmt":"2024-10-20T03:15:50","guid":{"rendered":"https:\/\/yorozu.cloudfree.jp\/wordpress\/?p=4345"},"modified":"2025-03-28T11:12:05","modified_gmt":"2025-03-28T02:12:05","slug":"pandas-dataframe","status":"publish","type":"post","link":"https:\/\/yorozu.cloudfree.jp\/wordpress\/?p=4345","title":{"rendered":"Pandas DataFrame"},"content":{"rendered":"\n

\u5b9f\u884c\u4f8b\u306f\u300cstupa.sarnath\u300d\u306e\u300cGoogle Colabotry\u300d\u74b0\u5883\u306b\u4fdd\u5b58\u3057\u3066\u3042\u308b<\/p>\n\n\n\n

\uff11\uff0e\u4f5c\u6210\u65b9\u6cd5<\/strong><\/h4>\n\n\n\n

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\u3000pd.DataFrame(data = \u683c\u7d0d\u3059\u308b\u30c7\u30fc\u30bf, index = \u884c\u540d, columns = \u5217\u540d)<\/p>\n\n\n\n

\uff12\uff0eDataFrame\u306e\u4f5c\u6210<\/strong><\/h4>\n\n\n\n

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import pandas as pd\nlist1=["a1","a2","a3"]\npd.DataFrame(data=list1)<\/code><\/pre><\/div>\n\n\n\n
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import numpy as np\narr1 = np.array([[1,2,3], [21,22,23], [31,32,33]])\npd.DataFrame(data=arr1)<\/code><\/pre><\/div>\n\n\n\n
\u3000\uff08\uff13\uff09\u8f9e\u66f8\u304b\u3089DataFrame\u3092\u4f5c\u6210\u3059\u308b
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dict1=dict(Row1=[1,21,31], Row2=[2,22,32], Row3=[3,23,33])\npd.DataFrame(data=dict1)<\/code><\/pre><\/div>\n\n\n\n
\u3000\uff08\uff14\uff09\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3084\u5217\u540d\u3092\u6307\u5b9a\u3057\u3066DataFrame\u3092\u4f5c\u6210\u3059\u308b
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list1=[[1,2,3], [21,22,23], [31,32,33]]\nindex1 = ["Row1", "Row2", "Row3"]\ncolumns1 =["Col1", "Col2", "Col3"]\npd.DataFrame(data=list1, index=index1, columns=columns1)<\/code><\/pre><\/div>\n\n\n\n
\uff13\uff0eDataFrame\u3078\u306e\u8ffd\u52a0\u30fb\u524a\u9664<\/strong><\/h4>\n\n\n\n
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\u3000\u3000\u3000\u6700\u521d\u306b\u30c7\u30fc\u30bf\u3092\u6e96\u5099\u3059\u308b<\/p>\n\n\n\n
list2 = [["P001", "iPhone 8 64GB", 85000],\n         ["P002", "iPhone X 256GB", 130000],\n         ["P003", "iPhone SE 32GB", 37000]]\ncolumns2 = ["Product ID", "Product Name", "Price (JPY)"]\ndf1 = pd.DataFrame(data=list2, columns=columns2)\ndf1<\/code><\/pre><\/div>\n\n\n\n
\u3000\u3000\u3000\u8ffd\u52a0\u3059\u308b\u30c7\u30fc\u30bf<\/p>\n\n\n\n
df2 = pd.DataFrame(data = [["P004", "iPhone 7 32GB", 10000]], \n                   columns = columns2)\ndf2<\/code><\/pre><\/div>\n\n\n\n
\u3000\u3000\u3000\u8ffd\u52a0\u51e6\u7406
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\u3000\u3000\u3000\u3000\u3000axis=1\u30fb\u30fb\u30fb\u5217\uff08columns\uff09\u3092\u5bfe\u8c61\u3068\u3059\u308b<\/p>\n\n\n\n
df1 = pd.concat([df1, df2], ignore_index=True, axis=0)\ndf1<\/code><\/pre><\/div>\n\n\n\n
df1 = pd.concat([df1, df2], ignore_index=False, axis=0)\ndf1<\/code><\/pre><\/div>\n\n\n\n
\u3000\uff08\uff12\uff09\u5217\u3092\u8ffd\u52a0\u3059\u308b<\/p>\n\n\n\n
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df1["Screen Size (in.)"] = [4.7, 5.8, 4, 4.7]\ndf1<\/code><\/pre><\/div>\n\n\n\n
\u3000\uff08\uff13\uff09\u884c\u3092\u524a\u9664\u3059\u308b<\/p>\n\n\n\n
\u3000\u5f15\u6570inplace\u304c\u5fc5\u8981
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\u3000\u3000\u3000False\u30fb\u30fb\u30fb\u5b9f\u884c\u7d50\u679c\u304c\u4fdd\u5b58\u3055\u308c\u306a\u3044<\/p>\n\n\n\n
df1.drop([2, 3], inplace = True)\ndf1<\/code><\/pre><\/div>\n\n\n\n
\uff08\uff14\uff09\u5217\u3092\u524a\u9664\u3059\u308b<\/p>\n\n\n\n
<\/p>\n\n\n\n
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\u3000\u3000\u3000axis=1\u30fb\u30fb\u30fb\u5217\uff08columns\uff09\u3092\u5bfe\u8c61\u3068\u3059\u308b<\/p>\n\n\n\n
df1.drop("Screen Size (in.)",axis=1,inplace=True)\ndf1<\/code><\/pre><\/div>\n","protected":false},"excerpt":{"rendered":"
\u30fbData Frame\u306e\u4f5c\u6210\u3001\u8ffd\u52a0\u3001\u524a\u9664\u306b\u3064\u3044\u3066<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[54],"tags":[17],"class_list":["post-4345","post","type-post","status-publish","format-standard","hentry","category-99_","tag-python"],"_links":{"self":[{"href":"https:\/\/yorozu.cloudfree.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yorozu.cloudfree.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yorozu.cloudfree.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yorozu.cloudfree.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/yorozu.cloudfree.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4345"}],"version-history":[{"count":16,"href":"https:\/\/yorozu.cloudfree.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4345\/revisions"}],"predecessor-version":[{"id":5771,"href":"https:\/\/yorozu.cloudfree.jp\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4345\/revisions\/5771"}],"wp:attachment":[{"href":"https:\/\/yorozu.cloudfree.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yorozu.cloudfree.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4345"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yorozu.cloudfree.jp\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}