我已经阅读了一个在SO上相似的帖子, 但是无法将答案适应到我的特定情况中。 我正在处理时间序列数据,并希望将两个不同的数据集合并到同一个图中。尽管我可以将数据合并到一个数据框中,但我真正感兴趣的是了解如何引用多个数据集。
模拟数据:
require(ggvis)
dfa <- data.frame(
date_a = seq(from= as.Date("2015-06-10"),
to= as.Date("2015-07-01"), by= 1),
val_a = c(2585.150, 2482.200, 3780.186, 3619.601,
0.000, 0.000, 3509.734, 3020.405,
3271.897, 3019.003, 3172.084, 0.000,
0.000, 3319.927, 2673.428, 3331.382,
3886.957, 2859.887, 0.000, 0.000,
2781.443, 2847.377) )
dfb <- data.frame(
date_b = seq(from= as.Date("2015-07-02"),
to= as.Date("2015-07-15"), by= 1),
val_b = c(3250.75429, 3505.43477, 3208.69141,
-2.08175, -27.30244, 3324.62348,
2820.91075, 3250.75429, 3505.43477,
3208.69141, -2.08175, -27.30244,
3324.62348, 2820.91075) )
利用上面提供的数据,我可以使用以下代码创建单独的图表:
单独的图表:(有效)
dfa %>%
ggvis( x= ~date_a , y= ~val_a, stroke := "black", opacity := 0.5 ) %>%
scale_datetime("x", nice = "month", domain = c(as.Date("2015-06-10"),
as.Date("2015-07-15") )) %>%
layer_lines() %>% layer_points( fill := "black" )
dfb %>%
ggvis( x= ~date_b , y= ~val_b, stroke := "red", opacity := 0.5 ) %>%
scale_datetime("x", nice = "month", domain = c(as.Date("2015-06-10"),
as.Date("2015-07-15") )) %>%
layer_lines() %>% layer_points( fill := "red" )
希望输出这两条线(黑色和红色)在同一个图中。以下是几次不成功的尝试:
尝试#1改编自SO post:
ggvis( data = dfa, x = ~date_a, y = ~val_a) %>% layer_lines(stroke := "black", opacity := 0.5 ) %>%
layer_lines( data = dfb, x= ~date_b , y= ~val_b, stroke := "red",
opacity := 0.5 ) %>%
scale_datetime("x", nice = "month", domain = c(as.Date("2015-06-10"),
as.Date("2015-07-15") ))
## Error in new_prop.default(x, property, scale, offset, mult, env, event, :
## Unknown input to prop: c(16618, 16619, 16620, 16621, 16622, 16623, 16624, ...
尝试 #2 基于 RStudio 文档:
ggvis( data = NULL, x = ~date_a, y = ~val_a) %>%
layer_lines(stroke := "black", opacity := 0.5, data = dfa ) %>%
layer_lines( x= ~date_b , y= ~val_b, stroke := "red",
opacity := 0.5, data = dfb ) %>%
scale_datetime("x", nice = "month", domain = c(as.Date("2015-06-10"),
as.Date("2015-07-15") ))
## Error in func() : attempt to apply non-function
这是在ggplot2中的一个极简实现:
require(ggplot2)
ggplot() +
geom_line(data = dfa, aes(x = date_a, y = val_a ), colour = "black") +
geom_line(data = dfb, aes(x = date_b, y = val_b ), colour = "red")
希望能提供可行的解决方案和简要说明,非常感谢您的帮助。