合併r中

-2

我有兩個數據幀中的兩個數據幀（更新和刪除值）：合併r中

data <- data.frame(ID1 = c("D1","D1","D1","D1","D2","D2"), 
       ID3 = c("A","A","D","D","B","C"), 
       Attribute = c("KL","KM","KL","KM","AB","AB"), 
       Value = c(2,2,3,3,5,7)) 


data_new <- data.frame(ID1 = c("D1","D1","D2","D2"), 
       ID2 = c("D1-1","D1-1","D2-1","D2-1"), 
       Attribute = c("KL","TA","AB","AA"))

現在我想從合併數據Values和ID3在我的新的數據幀。另外，我想刪除一些屬性並添加新的屬性。輸出應該看起來如下：

expected_output <- data.frame(ID1 = c("D1","D1","D1","D1","D2","D2","D2","D2"), 
          ID2 = c("D1-1","D1-1","D1-1","D1-1","D2-1","D2-1","D2-1","D2-1"), 
          ID3 = c("A","A","D","D","B","B","C","C"), 
          Attribute = c("KL","TA","KL","TA","AB","AA","AB","AA"), 
          Value = c(2,2,3,3,5,5,7,7))

任何人都可以幫助我嗎？

我到目前爲止嘗試的是一個簡單的合併。

mergeddata <- merge(data_new,data, 
       by.x = c("ID1"), 
       by.y = c("ID1"))

結果看起來很有希望爲ID1 = D2我只需要刪除列Attribute.x。」不過ID = D1是不是我想要的。行5-8不應該在新表了。

任何幫助

來源

2016-10-20 Walde

目前尚不清楚你想要做什麼是剛開的思考g從data和data_new到expected_output？ – user1945827

假設ID1是基金（ID3）中的一種證券，其中一些屬性附屬於證券（ID1）和每個基金的價值（頭寸）。現在，安全性的屬性發生了變化（data_new），並根據ID1獲得新的ID（ID2）。目標是用新屬性更新數據，但保留位置和值。這更清楚嗎？ – Walde

我想你可以嘗試以下方法：？

mergeddata <- merge(data_new ,unique(data[, c("ID1", "ID3", "Value")]), by = "ID1")

來源

2016-10-20 07:39:45 User2321

這看起來很有前途的謝謝 – Walde

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