在R中重塑数据帧

Question

我在R中有一个长格式的数据框，看起来像这样。

Branch.Name Customer.ID Loan.Type Date      Stage       Time
           A    C001    Home      20/11/05  Processing  10
           A    C001    Home      20/11/05  Approval    30
           A    C001    Home      20/11/05  Finalize    5
           A    C002    Business  23/11/05  Processing  30

我想将其转换为宽格式。

Branch.Name Customer.ID Loan.Type   Date     Processing Approval    Finalize
A           C001        Home        20/11/05    10        30        5
B           C002        Business    20/11/05    30        10        0
B           C003        Business    20/11/05    12        15        0

我看着重塑并融化了，但我弄乱了答案...

提前致谢

PS：并非所有行都有“ Processing”，“ Approval”和“ Finalize”作为阶段，有些行可能具有额外的阶段

Answer 1

这是一个基本的，从长到宽的转变。

请尝试以下方法之一：

## Base R
reshape(mydf, direction = "wide", 
        idvar = c("Branch.Name", "Customer.ID", "Loan.Type", "Date"), 
        timevar = "Stage")

## reshape2
library(reshape2)
dcast(mydf, Branch.Name + Customer.ID + Loan.Type + Date ~ Stage, value.var = "Time")
## dcast(mydf, ... ~ Stage, value.var = "Time")

## tidyr
library(tidyr)
spread(mydf, Stage, Time)