R行按行和列移調

Question

如何在R中以下列條件轉置數據幀？正常的轉置在這種情況下不起作用。

Current data

Expected output

謝謝！

Answer 1

就像是：

library(reshape2) 
df <- data.frame(Name=c("Tom", "Tom", "Hardy", "Hardy"), 
       Drug=c("drug1", "drug2", "drug1", "drug3"), 
       Value=c(20,10,30,40)) 
dcast(df,Name~Drug, fill = 0) 

    Name drug1 drug2 drug3 
1 Hardy 30  0 40 
2 Tom 20 10  0