[英]How to include apply and function together with multiple ifelse condit
我是R編程的新手,完全陷於尋找以下問題的解決方案。
我有一個數據集“ full_data”(接近80個變量),但簡稱為:
CustomerID ReachRatio CustomerGrade PolicyCount
1 10 Loyal 2
2 40 Normal 6
3 80 VIP 11
4 100 Normal 7
CustomerID: sequence of unique ID
Reach :a score out of 100 for customer based on contact details
CustomerGrade: It has label as 'Normal','VIP','Loyal' or 'To be calculated','NA' and 'Uncalculated' etc
PolicyCount:No of policy brought by customer in a timeframe so >5 is good
我想在r中編寫一個函數來根據權重為這3個客戶計算得分,因為:/ *此代碼不起作用* /
full_data$CustomerScore = apply(full_data,1,function(row)
(((ifelse(row["CustomerGrade"]=='LOYAL',1,0)*30)+
(ifelse(row["CustomerGrade"]=='NORMAL',1,0)*20)+
(ifelse(row["PolicyCount"]>=4){ 1*30})+
(ifelse(row["ReachRatio"]>=40 && row["ReachRatio"]<=80,1,0)*40)))
)
因此,例如,我的最終結果CustomerScore是基於應用於每個類別的權重得出的100的值。在上述代碼中,客戶等級:總重量:30(如果為loyal--30,normal--20,else--0) count:weight:30 [如果被散布的可以有更多值,但總wt為30]達到比率weight:40 [例如,如果> 80--40,> 40 && <80--20 ...]
如何在R中有效地實現它?
任何建議和想法都歡迎!!
非常感謝 !!
我們不需要遍歷所有行。 這可以向量化。 基於OP的ifelse
語句中使用的邏輯
with(df1, sum(30*(CustomerGrade =='Loyal')+
20*(CustomerGrade == 'Normal') +
30*(PolicyCount >=4) +
40*(ReachRatio>=40 & ReachRatio <=80)))
嘗試這個:
apply(X = df,MARGIN = 1,function(row){
ifelse(row["CustomerGrade"]=='Loyal',30,0)+
ifelse(row["CustomerGrade"]=='Normal',20,0)+
ifelse(row["PolicyCount"]>=4,30,0)+
ifelse(row["ReachRatio"]>=40 && row["ReachRatio"]<=80,20,0)+
ifelse(row["ReachRatio"]>80,40,0)})
#[1]30 70 40 50
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.