对于示例数据框:
df <- structure(list(region = structure(c(1L, 1L, 1L, 1L, 1L, 2L, 2L,
2L, 2L, 2L, 2L), .Label = c("a", "b", "c", "d"), class = "factor"),
result = c(0L, 1L, 1L, 0L, 0L, 1L, 0L, 0L, 0L, 1L, 0L), weight = c(0.126,
0.5, 0.8, 1.5, 5.3, 2.2, 3.2, 1.1, 0.1, 1.3, 2.5)), .Names = c("region",
"result", "weight"), row.names = c(NA, 11L), class = "data.frame")
我正在制作一个加权的xtab:
df$region <- factor(df$region)
result <- xtabs(weight ~ result + region, data=df)
result
这是:
region
result a b
0 6.926 6.900
1 1.300 3.500
如何翻转xtab,使区域和结果变量相反(即区域为行,结果为列)。
我认为这可能会奏效,但不行!
result <- xtabs(region + (weight ~ result), data=df)
非常感谢任何帮助。
答案 0 :(得分:2)
只需颠倒条目的顺序:
xtabs(weight ~ region + result, data=df)