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</o:shapelayout></xml><![endif]--></head><body lang=PT-BR link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Obrigado Walmes,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Descupe a demora em responder, vou tentar aqui!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'>Humberto<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>De:</span></b><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> R-br [mailto:r-br-bounces@listas.c3sl.ufpr.br] <b>Em nome de </b>walmes .<br><b>Enviada em:</b> Monday, September 1, 2014 3:06 PM<br><b>Para:</b> r-br@listas.c3sl.ufpr.br<br><b>Assunto:</b> Re: [R-br] percentage prediction error<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-family:"Trebuchet MS","sans-serif"'>Qual a definição/expressão matemática desse tipo de viés? Minha supeita é que seja algo do tipo<o:p></o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-family:"Trebuchet MS","sans-serif"'>ppe = (y_{obs}-y_{pred})/y_{pred},<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-family:"Trebuchet MS","sans-serif"'>em que obs remetem as observações no data.frame try e pred os preditos pelo modelo ajustado a partir dos valores do data.frame try.<br><br>À disposição.<br>Walmes.<o:p></o:p></span></p></div><p class=MsoNormal><o:p></o:p></p></div></div></body></html>