我有一个小的本地数据集(5 个观察值),有两种类型:a 和 b。每个观察都有一个日期字段 (p.start)、一个比率和一个持续时间。
local
principal p.start duration allocated.days ratio
1 P 2015-03-18 1 162.0000 162.0000
2 V 2015-08-28 4 24.0000 6.0000
3 V 2015-09-03 1 89.0000 89.0000
4 V 2015-03-30 1 32.0000 32.0000
5 P 2015-01-29 1 150.1667 150.1667
str(local)
'data.frame': 5 obs. of 5 variables:
$ principal : chr "P" "V" "V" "V" ...
$ p.start : Date, format: "2015-03-18" "2015-08-28" "2015-09-03" "2015-03-30" ...
$ duration : Factor w/ 10 levels "1","2","3","4",..: 1 4 1 1 1
$ allocated.days: num 162 24 89 32 150
$ ratio : num 162 6 89 32 150
我有另一个数据框 stats,其中包含要添加到多面图中的文本。
stats
principal xx yy zz
1 P 2015-02-28 145.8 Average = 156
2 V 2015-02-28 145.8 Average = 24
str(stats)
'data.frame': 2 obs. of 4 variables:
$ principal: chr "P" "V"
$ xx : Date, format: "2015-02-28" "2015-02-28"
$ yy : num 146 146
$ zz : chr "Average = 156" "Average = 24"
以下代码失败:
p = ggplot (local, aes (x = p.start, y = ratio, size = duration))
p = p + geom_point (colour = "blue"); p
p = p + facet_wrap (~ principal, nrow = 2); p
p = p + geom_text(aes(x=xx, y=yy, label=zz), data= stats)
p
Error: Continuous value supplied to discrete scale
有任何想法吗?我错过了一些明显的东西。