Answers for "ddply"

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ddply

#ddply(conjunto_de_datos, variables_usadas_para_agrupar, función_que_se_aplicará)
#ejemplo# 
transacciones <- ddply(retail,c("InvoiceNo","Fecha"),
                         function(df1)paste(df1$Description,
                                            collapse = ","))

Posted by: Guest on March-20-2021

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