{"id":3979,"date":"2023-07-14T09:40:25","date_gmt":"2023-07-14T09:40:25","guid":{"rendered":"https:\/\/statorials.org\/cn\/sas-%e5%a6%82%e6%9e%9c%e9%82%a3%e4%b9%88%e5%90%a6%e5%88%99\/"},"modified":"2023-07-14T09:40:25","modified_gmt":"2023-07-14T09:40:25","slug":"sas-%e5%a6%82%e6%9e%9c%e9%82%a3%e4%b9%88%e5%90%a6%e5%88%99","status":"publish","type":"post","link":"https:\/\/statorials.org\/cn\/sas-%e5%a6%82%e6%9e%9c%e9%82%a3%e4%b9%88%e5%90%a6%e5%88%99\/","title":{"rendered":"\u5982\u4f55\u5728 sas \u4e2d\u4f7f\u7528 if-then-else\uff08\u9644\u793a\u4f8b\uff09"},"content":{"rendered":"

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\u60a8\u53ef\u4ee5\u5728 SAS \u4e2d\u4f7f\u7528IF-THEN-ELSE<\/strong>\u8bed\u53e5\uff0c\u5982\u679c<\/em>\u6761\u4ef6\u4e3a\u771f\uff0c\u5219\u8fd4\u56de\u4e00\u4e2a\u503c\uff1b\u5982\u679c\u6761\u4ef6\u4e0d\u4e3a\u771f\uff0c\u5219<\/em>\u8fd4\u56de\u53e6\u4e00\u4e2a\u503c\u3002<\/span><\/p>\n

\u8be5\u8bed\u53e5\u4f7f\u7528\u4ee5\u4e0b\u57fa\u672c\u8bed\u6cd5\uff1a<\/span><\/p>\n

 if<\/span> var1 > 30<\/span> then<\/span> var2 = 'good';\nelse<\/span> var2 = 'bad';\n<\/strong><\/span><\/pre>\n
\u60a8\u8fd8\u53ef\u4ee5\u5c06\u591a\u4e2aELSE IF<\/strong>\u8bed\u53e5\u94fe\u63a5\u5728\u4e00\u8d77\uff0c\u4ee5\u6839\u636e\u66f4\u591a\u6761\u4ef6\u8fd4\u56de\u66f4\u591a\u6f5c\u5728\u503c\uff1a<\/span><\/p>\n
 if<\/span> var1 > 35<\/span> then<\/span> var2 = 'great';\nelse if<\/span> var1 > 30<\/span> then<\/span> var2 = 'good';\nelse<\/span> var2 = 'bad';\n<\/strong><\/span><\/pre>\n
\u4ee5\u4e0b\u793a\u4f8b\u5c55\u793a\u4e86\u5982\u4f55\u5728\u5b9e\u8df5\u4e2d\u9488\u5bf9 SAS \u4e2d\u7684\u4ee5\u4e0b\u6570\u636e\u96c6\u4f7f\u7528\u8fd9\u4e9b\u8bed\u53e5\uff1a<\/span> <\/p>\n
 \/*create dataset*\/\n<\/span>data<\/span> original_data;\n    input<\/span> team $points;\n    datalines<\/span> ;\nCavs 12\nCavs 14\nWarriors 15\nHawks 18\nMavs 31\nMavs 32 \nMavs 35\nCeltics 36\nCeltics 40\n;\nrun<\/span> ;\n\n\/*view dataset*\/\n<\/span>proc print<\/span> data<\/span> = original_data;<\/strong><\/span> <\/pre>\n
\"\"<\/p>\n
\u793a\u4f8b 1\uff1a SAS \u4e2d\u7684 IF-THEN-ELSE<\/strong><\/b><\/span><\/h2>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bIF-THEN-ELSE<\/strong>\u8bed\u53e5\u521b\u5efa\u4e00\u4e2a\u540d\u4e3arating<\/strong>\u7684\u65b0\u53d8\u91cf\uff0c\u5982\u679c\u70b9<\/strong>\u5217\u4e2d\u7684\u503c\u5927\u4e8e 30\uff0c\u5219\u8be5\u53d8\u91cf\u53d6\u503c\u201cgood\u201d\uff0c\u5426\u5219\u53d6\u503c\u201cbad\u201d\uff1a<\/span> <\/p>\n
 \/*create new dataset with new variable called rating*\/\n<\/span>data<\/span> new_data;\n    set<\/span> original_data;\n    if<\/span> points > 30<\/span> then<\/span> rating = 'good';\n    else<\/span> rating = 'bad';\nrun<\/span> ;\n\n<\/span>\/*view new dataset*\/\n<\/span>proc print<\/span> data<\/span> =new_data;<\/span><\/strong> <\/pre>\n
\"\"<\/p>\n
\u8bf7\u6ce8\u610f\uff0c\u5982\u679c\u70b9<\/strong>\u5217\u7684\u503c\u5927\u4e8e 30\uff0c\u5219\u540d\u4e3a\u201c\u8bc4\u7ea7<\/strong>\u201d\u7684\u65b0\u5217\u5c06\u53d6\u503c\u201c\u597d\u201d\uff0c\u5426\u5219\u5c06\u53d6\u503c\u201c\u5dee\u201d\u3002<\/span><\/p>\n
\u793a\u4f8b 2\uff1a SAS \u4e2d\u7684 IF-THEN-ELSE IF<\/strong><\/b><\/span><\/h2>\n
\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bIF-THEN-ELSE IF<\/strong>\u8bed\u53e5\u6765\u521b\u5efa\u4e00\u4e2a\u540d\u4e3arating<\/strong>\u7684\u65b0\u53d8\u91cf\uff0c\u8be5\u53d8\u91cf\u91c7\u7528\u4ee5\u4e0b\u503c\uff1a<\/span><\/p>\n