{"id":311016,"date":"2021-01-14T11:59:39","date_gmt":"2021-01-14T03:59:39","guid":{"rendered":"http:\/\/4563.org\/?p=311016"},"modified":"2021-01-14T11:59:39","modified_gmt":"2021-01-14T03:59:39","slug":"%e6%93%8d%e4%bd%9c%e7%ac%a6%e6%94%af%e6%8c%81-dataframe-%e5%ae%9e%e4%be%8b","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=311016","title":{"rendered":"[] \u64cd\u4f5c\u7b26\u652f\u6301 DataFrame \u5b9e\u4f8b"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  [] \u64cd\u4f5c\u7b26\u652f\u6301 DataFrame \u5b9e\u4f8b               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : fanqieipnet <\/span>  <span><i><\/i> 5<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\">                        [] \u64cd\u4f5c\u7b26\u652f\u6301 DataFrame \u5b9e\u4f8b\u3002\u5177\u4f53\u662f\u600e\u4e48\u56de\u4e8b\u5462?\u4eca\u5929\u756a\u8304\u52a0\u901f\u5c31\u6765\u8bb2\u4e00\u4e0b\u3002<\/p>\n<p>\u3000\u3000\u5148\u95ee\u60a8\u4e00\u4e0b\uff1a\u60a8\u77e5\u9053 df1 &gt; 4 \u8fd4\u56de\u7684\u7c7b\u578b\u662f\u4ec0\u4e48\u5417?<\/p>\n<p>\u3000\u3000\u7b54\u6848\uff1aDataFrame \u5b9e\u4f8b\uff0c\u7ed3\u679c\u5982\u4e0b\uff0c\u5143\u7d20\u53d6\u503c\u4e0d\u96be\u7406\u89e3\u3002<\/p>\n<p>\u3000\u3000 c1 c2 c3<\/p>\n<p>\u3000\u3000 r1 True True True<\/p>\n<p>\u3000\u3000 r2 False False False<\/p>\n<p>\u3000\u3000 r3 True True False<\/p>\n<p>\u3000\u3000 r4 True True False<\/p>\n<p>\u3000\u3000\u65e2\u7136 [] \u64cd\u4f5c\u7b26\u652f\u6301 DataFrame \u5b9e\u4f8b\uff0c\u90a3\u4e48\u8fd4\u56de\u7684\u7ed3\u679c\u60a8\u4e00\u5b9a\u60f3\u77e5\u9053\uff1a<\/p>\n<p>\u3000\u3000 df1[ df1 &gt; 4 ]<\/p>\n<p>\u3000\u3000#\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<p>\u3000\u3000 c1 c2 c3<\/p>\n<p>\u3000\u3000 r1 6.0 9.0 6.0<\/p>\n<p>\u3000\u3000 r2 NaN NaN NaN<\/p>\n<p>\u3000\u3000 r3 8.0 7.0 NaN<\/p>\n<p>\u3000\u3000 r4 5.0 6.0 NaN<\/p>\n<p>\u3000\u3000\u770b\u5230\u7ed3\u679c\uff0c\u53ef\u80fd\u4e0d\u7528\u89e3\u91ca\uff0c\u60a8\u4e5f\u77e5\u9053\u600e\u4e48\u56de\u4e8b\u4e86\u3002<\/p>\n<p>\u3000\u3000\u4e0b\u9762\uff0c\u5f15\u51fa\u4e00\u4e2a\u5947\u602a\u7684\u95ee\u9898\uff0c\u5927\u5bb6\u53ef\u4ee5\u56de\u53bb\u601d\u8003\u3002\u8fd9\u4e2a\u64cd\u4f5c\u7684 readable \u4e0d\u662f\u5f88\u597d\uff0c\u6240\u4ee5\u89c9\u5f97\u6b64\u64cd\u4f5c\u5f88\u5947\u602a\u3002<\/p>\n<p>\u3000\u3000\u4e0a\u9762\u8bb2\u5230\uff0c[] \u64cd\u4f5c\u7b26\u652f\u6301 DataFrame \u5b9e\u4f8b\uff0c\u4e0d\u8fc7\uff0c\u5982\u679c\u6211\u4eec\u5265\u53bb\u5b83\u7684\u5c42\u5c42\u5916\u8863\uff0c\u76f4\u5954\u6700\u672c\u8d28\uff0c\u63ea\u51fa\u5b83\u540e\u5c31\u662f\u4e00\u4e2a list \u5b9e\u4f8b\uff1a<\/p>\n<p>\u3000\u3000 inner = ((df1&gt;4).values).tolist()<\/p>\n<p>\u3000\u3000 inner<\/p>\n<p>\u3000\u3000#\u7ed3\u679c\uff0c\u7c7b\u578b\u662f list<\/p>\n<p>\u3000\u3000[[True, True, True],<\/p>\n<p>\u3000\u3000[False, False, False],<\/p>\n<p>\u3000\u3000[True, True, False],<\/p>\n<p>\u3000\u3000[True, True, False]]<\/p>\n<p>\u3000\u3000\u63a5\u4e0b\u6765\uff0c\u5c31\u662f\u89c1\u8bc1\u5947\u8ff9\u7684\u65f6\u523b\uff1a<\/p>\n<p>\u3000\u3000 df1[inner]<\/p>\n<p>\u3000\u3000#\u7ed3\u679c ???<\/p>\n<p>\u3000\u3000\u60a8\u60f3\u5230\u4e86\u5417?<\/p>\n<p>\u3000\u3000\u7b54\u6848\uff1a<\/p>\n<p>\u3000\u3000 c1 c2 c3<\/p>\n<p>\u3000\u3000 r1 6 9 6<\/p>\n<p>\u3000\u3000 r1 6 9 6<\/p>\n<p>\u3000\u3000 r1 6 9 6<\/p>\n<p>\u3000\u3000 r3 8 7 3<\/p>\n<p>\u3000\u3000 r3 8 7 3<\/p>\n<p>\u3000\u3000 r4 5 6 3<\/p>\n<p>\u3000\u3000 r4 5 6 3<\/p>\n<p>\u3000\u3000\u5dee\u4e0d\u591a\uff0c\u60a8\u4e5f\u53ef\u4ee5\u89e3\u91ca\u4e3a\u4ec0\u4e48\u7ed3\u679c\u662f\u8fd9\u6837\u4e86\u5427!\u4eca\u5929\uff0c\u53ea\u60f3\u5c3d\u91cf\u804a\u900f [] \u64cd\u4f5c\u7b26\u8bbf\u95ee\u6570\u636e\u8fd9\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5f53\u7136\u8fd8\u6709\u66f4\u591a\u7684\u8bbf\u95ee\u6570\u636e\u7684\u51fd\u6570\uff0c\u6bd4\u5982 iloc, loc \u7b49\u3002      <\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>0<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>[] \u64cd\u4f5c\u7b26\u652f\u6301 DataFram&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/311016"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=311016"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/311016\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=311016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=311016"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=311016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}