{"id":2630,"date":"2023-07-21T10:30:26","date_gmt":"2023-07-21T10:30:26","guid":{"rendered":"https:\/\/statorials.org\/pt\/percentis-sas\/"},"modified":"2023-07-21T10:30:26","modified_gmt":"2023-07-21T10:30:26","slug":"percentis-sas","status":"publish","type":"post","link":"https:\/\/statorials.org\/pt\/percentis-sas\/","title":{"rendered":"Como calcular percentis no sas: com exemplos"},"content":{"rendered":"

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Aqui est\u00e3o as tr\u00eas maneiras mais comuns de calcular percentis para um conjunto de dados no SAS:<\/span><\/p>\n

M\u00e9todo 1: Calcular um valor percentil espec\u00edfico<\/strong><\/span><\/p>\n

 \/*calculate 70th percentile value for var1*\/\n<\/span>proc univariate<\/span> data<\/span> =original_data;\n    <\/span>var<\/span> var1;\n    <\/span>output out<\/span> =percentile_data\n<\/span>pctlpts<\/span> =<\/span> 70<\/span>\n    pctlpre<\/span> = P_;\n<\/span>run<\/span> ;\n<\/span><\/strong><\/span><\/pre>\n
 M\u00e9todo 2: calcular v\u00e1rios valores percentuais espec\u00edficos<\/strong><\/span><\/p>\n
 \/*calculate 70th, 80th, and 90th percentile value for var1*\/\n<\/span>proc univariate<\/span> data<\/span> =original_data;\n    var<\/span> var1;\n    output out<\/span> =percentile_data\n    pctlpts<\/span> = 70 80 90<\/span>\n    pctlpre<\/span> = P_;\nrun<\/span> ;<\/strong><\/span><\/pre>\n
 M\u00e9todo 3: calcular percentis por grupo<\/strong><\/span><\/p>\n
 \/*sort original data by var2*\/\n<\/span>proc sort<\/span> data<\/span> = original_data;\n    by<\/span> var2;\nrun<\/span> ;\n\n\/*calculate percentiles for var1 grouped by var2*\/\n<\/span>proc univariate<\/span> data<\/span> =original_data;\n    var<\/span> var1;\n    by<\/span> var2;\n    output<\/span> out<\/span> =percentile_data\n    pctlpts<\/span> = 70, 80, 90\n    pctlpre<\/span> = P_;\nrun<\/span> ;<\/strong><\/span><\/pre>\n
 Nota<\/strong> : A instru\u00e7\u00e3o pctlpts<\/strong> especifica os percentis a serem calculados e a instru\u00e7\u00e3o pctlpre<\/strong> especifica o prefixo a ser usado para os percentis na sa\u00edda.<\/span><\/p>\n
 Os exemplos a seguir mostram como usar cada m\u00e9todo com o seguinte conjunto de dados no SAS:<\/span> <\/p>\n
 \/*create dataset*\/\ndata<\/span> original_data;\n    input<\/span> team $points;\n    datalines<\/span> ;\nAT 12\nAt 15\nAt 16\nAt 21\nAt 22\nAt 25\nAt 29\nAt 31\nB16\nB22\nB25\nB29\nB 30\nB 31\nB 33\nB 38\n;\nrun<\/span> ;\n\n\/*view dataset*\/\n<\/span>proc print<\/span> data<\/span> = original_data;<\/span><\/span><\/strong> <\/pre>\n
\"\"<\/p>\n
 Exemplo 1: Calcular um valor percentil espec\u00edfico<\/strong><\/span><\/h3>\n
 O c\u00f3digo a seguir mostra como calcular o percentil 70 para a vari\u00e1vel pontos<\/strong> :<\/span> <\/p>\n
 \/*calculate 70th percentile value for points*\/\n<\/span>proc univariate<\/span> data<\/span> =original_data;\n    var<\/span> points;\n    output out<\/span> =percentile_data\n    pctlpts<\/span> = 70<\/span>\n    pctlpre<\/span> = P_;\nrun<\/span> ;\n\n\/*view results*\/<\/span>\nproc print<\/span> data<\/span> =percentile_data;\n<\/strong><\/span><\/pre>\n
\"\"<\/p>\n
 O valor no percentil 70 \u00e9 30<\/strong> .<\/span><\/p>\n
 Exemplo 2: Calcular v\u00e1rios valores percentuais espec\u00edficos<\/strong><\/span><\/h3>\n
 O c\u00f3digo a seguir mostra como calcular os valores dos percentis 70, 80 e 90 para a vari\u00e1vel pontos<\/strong> :<\/span> <\/p>\n
 \/*calculate 70th, 80th, and 90th percentile value for points*\/\n<\/span>proc univariate<\/span> data<\/span> =original_data;\n    var<\/span> points;\n    output out<\/span> =percentile_data\n    pctlpts<\/span> = 70 80 90<\/span>\n    pctlpre<\/span> = P_;\nrun<\/span> ;<\/strong><\/span> <\/pre>\n
\"\"<\/p>\n
 Veja como interpretar o resultado:<\/span><\/p>\n