我有以下示例数据集：
Month Model Alert
3 January Mod1 1
9 January Mod2 0
15 January Mod3 3
21 January Mod4 3
27 January Mod5 1
2 February Mod1 0
8 February Mod2 0
14 February Mod3 2
20 February Mod4 1
26 February Mod5 1
如何有效地使用移调/整形功能来获得这种格式？
Model January February
Mod1 1 0
Mod2 0 0
Mod3 3 2
Mod4 3 1
Mod5 1 1
谢谢！
使用解决方案更新：
library(reshape2)
x <- melt(test, c("Month", "Model Name"), "Alert")
x2 <- dcast(test, `Model Name` ~ Month)
Model Name January February March April May June
1 Mod1 1 0 1 2 0 2
2 Mod2 0 0 0 0 0 0
3 Mod3 3 2 2 2 3 2
4 Mod4 3 1 1 1 3 0
5 Mod5 1 1 2 1 1 2
6 Mod7 NA NA NA NA 0 NA