[问题类型]: 程式谘询(我想用R 做某件事情，但是我不知道要怎麽用R 写出来) [软体熟悉度]: 入门(写过其他程式，只是对语法不熟悉) [问题叙述]: hi大家好 我现在有10个档案，档名是 Sale1~10.csv 10个档案代表1~10年的销售资料 column都是一些产品名称 row是月份 现在我想要把固定一个产品的某个月份，观看十年来的差异 本来我用了split函数就能捞到我想看的10年的<产品+月份> 然後产生一个CSV档，我再用EXCEL拉出趋势图看 (EXCEL颜色比较漂亮Q_Q) 但是我主管想要自己去挑选<产品+月份>的组合自己跑R来看资料 我就必须要把程式写得比较弹性让他自行输入产品跟月份 最後一样只要产生一个CSV档给他自己拉趋势图看就好 [程式范例]: #读档 year1 <- read.csv("D:/year1.csv") year2 <- read.csv("D:/year2.csv") year3 <- read.csv("D:/year3.csv") year4 <- read.csv("D:/year4.csv") year5 <- read.csv("D:/year5.csv") year6 <- read.csv("D:/year6.csv") year7 <- read.csv("D:/year7.csv") year8 <- read.csv("D:/year8.csv") year9 <- read.csv("D:/year9.csv") year10 <- read.csv("D:/year10.csv") #挑选想看的产品资料并依月分做切割 year1.Product1 = split(year1$Product1 , year1$Month) year2.Product1 = split(year2$Product1 , year2$Month) year3.Product1 = split(year3$Product1 , year3$Month) year4.Product1 = split(year4$Product1 , year4$Month) year5.Product1 = split(year5$Product1 , year5$Month) year6.Product1 = split(year6$Product1 , year6$Month) year7.Product1 = split(year7$Product1 , year7$Month) year8.Product1 = split(year8$Product1 , year8$Month) year9.Product1 = split(year9$Product1 , year9$Month) year10.Product1 = split(year10$Product1 , year10$Month) #挑出Product1在十年来July销售量 year1Product1July =year1.Product1$"July" year2Product1July =year2.Product1$"July" year3Product1July =year3.Product1$"July" year4Product1July =year4.Product1$"July" year5Product1July =year5.Product1$"July" year6Product1July =year6.Product1$"July" year7Product1July =year7.Product1$"July" year8Product1July =year8.Product1$"July" year9Product1July =year9.Product1$"July" year10Product1July =year10.Product1$"July" #存成dataframe後输出到csv Product1July = data.frame(year1Product1July,year2Product1July,year3Product1July, year4Product1July,year5Product1July,year6Product1July,year7Product1July, year8Product1July,year9Product1July,year10Product1July) write.csv(Product1July, file="D:/Product1July.csv") 我尝试着先以 #挑选想看的产品资料并依月分做切割 写了for回圈搭配paste结果失败了 Product = "Product1" #可自行输入产品编号 Month = "July" #可指定月份 for(i in 1:10){ x = paste("year",i,Product,sep=""); y = paste("year",i,"$",Product,sep=""); z = paste("year",i,"$",Month,sep=""); x = split(y,z); } 请问我上面程式要怎麽修改才能让做到像上面那些指令的结果呢 感觉是split认为paste出来的东西不是object 我想要把上面这些写死的script写得更弹性简洁一些 求高人指点 谢谢 [关键字]: 选择性，也许未来有用 -- ┐ ＊ ┐ ＊ ＊ │ │ ╭──╮ ╭──╮ ＊╭──╮ ├──╯ ┘ │ ┐＊│ │ ＊│ ◣ ◢ │ ＊╮ ╭──┤＊ ╭┼─╯ ├──╯＊ █▌ │ │ │＊ │ │ ┐ │ ┐ ＊ ◣S ┘ ┘ ╰──╰ ╰──╯ ╰──╯ --

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