{"id":10897,"date":"2025-07-15T13:34:51","date_gmt":"2025-07-15T13:34:51","guid":{"rendered":"https:\/\/functiontranslator.com\/previsao\/"},"modified":"2021-02-25T17:19:37","modified_gmt":"2021-02-25T17:19:37","slug":"forecast","status":"publish","type":"post","link":"https:\/\/functiontranslator.com\/pt-pt\/forecast\/","title":{"rendered":"PREVIS\u00c3O"},"content":{"rendered":"

Sintaxe e uso geral da fun\u00e7\u00e3o de previs\u00e3o<\/h2>\n

A fun\u00e7\u00e3o PREVIS\u00c3O \u00e9 amplamente utilizada no Microsoft Excel e no Google Planilhas para projetar um valor futuro com base em dados hist\u00f3ricos. Essa fun\u00e7\u00e3o \u00e9 extremamente \u00fatil em an\u00e1lises financeiras, estat\u00edsticas e processos de planejamento.<\/p>\n

No Excel, essa fun\u00e7\u00e3o \u00e9 denominada FORECAST.LINEAR<\/code>, enquanto no Google Planilhas \u00e9 chamada simplesmente de FORECAST<\/code>. A sintaxe b\u00e1sica para ambas as plataformas \u00e9 apresentada a seguir:<\/p>\n

 FORECAST(x, dados_y, dados_x)<\/code> <\/pre>\n
Os par\u00e2metros usados s\u00e3o:<\/p>\n
    \n
  • x<\/strong> \u00e9 o ponto de dados para o qual deseja-se estimar um valor futuro.<\/li>\n
  • dados_y<\/strong> consiste em um conjunto de valores dependentes j\u00e1 conhecidos.<\/li>\n
  • dados_x<\/strong> compreende um conjunto de valores independentes que correspondem aos valores em dados_y<\/strong>.<\/li>\n<\/ul>\n
    Exemplos de implementa\u00e7\u00e3o<\/h2>\n
    A seguir, s\u00e3o fornecidos exemplos pr\u00e1ticos para uma melhor compreens\u00e3o da fun\u00e7\u00e3o.<\/p>\n
    Exemplo 1: Previs\u00e3o de vendas futuras<\/h2>\n
    Considere o seguinte conjunto de dados de vendas mensais de um produto:<\/p>\n\n\n\n\n\n\n\n
    M\u00eas<\/th>\nVendas<\/th>\n<\/tr>\n
    Janeiro<\/td>\n100<\/td>\n<\/tr>\n
    Fevereiro<\/td>\n120<\/td>\n<\/tr>\n
    Mar\u00e7o<\/td>\n130<\/td>\n<\/tr>\n
    Abril<\/td>\n125<\/td>\n<\/tr>\n
    Maio<\/td>\n140<\/td>\n<\/tr>\n<\/table>\n
    Para prever as vendas de junho, atribu\u00edmos os meses valores num\u00e9ricos: Janeiro = 1, Fevereiro = 2, etc. Assim, dados_x<\/code> seria [1, 2, 3, 4, 5] e dados_y<\/code> seria [100, 120, 130, 125, 140].<\/p>\n
    =FORECAST(6, [100, 120, 130, 125, 140], [1, 2, 3, 4, 5])<\/code><\/pre>\n
    Essa f\u00f3rmula retorna a previs\u00e3o de vendas para o m\u00eas de junho, com base nos dados anteriores.<\/p>\n
    Exemplo 2: Previs\u00e3o de temperatura<\/h2>\n
    Para ilustrar uma aplica\u00e7\u00e3o diferente, considere as temperaturas m\u00e1ximas registradas durante uma semana:<\/p>\n\n\n\n\n\n\n\n
    Dia<\/th>\nTemperatura M\u00e1xima (\u00b0C)<\/th>\n<\/tr>\n
    Segunda<\/td>\n22<\/td>\n<\/tr>\n
    Ter\u00e7a<\/td>\n24<\/td>\n<\/tr>\n
    Quarta<\/td>\n19<\/td>\n<\/tr>\n
    Quinta<\/td>\n21<\/td>\n<\/tr>\n
    Sexta<\/td>\n23<\/td>\n<\/tr>\n<\/table>\n
    Definindo dados_x<\/code> como [1, 2, 3, 4, 5] (dias da semana de segunda a sexta) e dados_y<\/code> como [22, 24, 19, 21, 23], para prever a temperatura de s\u00e1bado:<\/p>\n
    =FORECAST(6, [22, 24, 19, 21, 23], [1, 2, 3, 4, 5])<\/code><\/pre>\n
    O resultado fornece uma estimativa baseada nas tend\u00eancias dos dados anteriores.<\/p>\n
    Em suma, a fun\u00e7\u00e3o PREVIS\u00c3O \u00e9 uma ferramenta valiosa para se fazer proje\u00e7\u00f5es futuras com base em padr\u00f5es preexistentes. Isso pode ser crucial para o planejamento organizacional, abrangendo desde a previs\u00e3o de vendas at\u00e9 an\u00e1lise de tend\u00eancias clim\u00e1ticas.<\/p>\n","protected":false},"excerpt":{"rendered":"
    Devolve um valor ao longo de uma tend\u00eancia linear<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[442],"tags":[],"class_list":["post-10897","post","type-post","status-publish","format-standard","hentry","category-estatistica"],"acf":[],"yoast_head":"\nFun\u00e7\u00e3o FORECAST (PREVIS\u00c3O) no Excel \u2013 como funciona, exemplos e sintaxe<\/title>\n<meta name=\"description\" content=\"Breve descri\u00e7\u00e3o da fun\u00e7\u00e3o FORECAST (PREVIS\u00c3O) do Excel. 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