Question

我的数据如下：

> head(Full.df)
        Date      Month       Week       Year Count.S Count.G Count.W Count.F
1 2006-01-02 2006-01-01 2006-01-02 2006-01-01       0       7       9       6
2 2006-01-03 2006-01-01 2006-01-02 2006-01-01       0      13      12       4
3 2006-01-04 2006-01-01 2006-01-02 2006-01-01       0      13      15       4
4 2006-01-05 2006-01-01 2006-01-02 2006-01-01       0      20       6       3
5 2006-01-06 2006-01-01 2006-01-02 2006-01-01       0      19      19       4
6 2006-01-07 2006-01-01 2006-01-02 2006-01-01       0       4      16       5

对于单个变量，我使用了下一行代码：

ggplot(data = Full.df, aes(Month, Count.S)) + stat_summary(fun.y = sum, geom ="line") + scale_x_date(
labels = date_format("%m-%y"),
breaks = "3 months")

我想将Count.S，Count.G，Count.W，Count.F作为四行放在同一平面上，但我无法弄清楚如何在ggplot（或任何其他包）中绘制所有四个变量。感谢。

编辑：虽然提供给不同问题的链接非常有用，但其中的答案解释了如何在一个图像中绘制不同的图形。但是，我想知道如何在单个XY轴上绘制与各种变量对应的线。

Answer 1

两种方法：

如果样本数据创建如下：

Full.df <- data.frame(Date = as.Date("2006-01-01") + as.difftime(0:364, units = "days"))
Full.df$Month <- as.Date(format(Full.df$Date, "%Y-%m-01"))
Full.df[paste0("Count.", c("S", "G", "W", "F"))] <-
  matrix(sample(100, 365 * 4, replace = TRUE), ncol = 4)

使用reshape2包的最佳方式：

molten <- melt(Full.df, id.vars = c("Date", "Month"),
  variable.name = "Category", value.name = "Count")
ggplot(data = molten, aes(x = Month, y = Count, colour = Category)) +
  stat_summary(fun.y = sum, geom ="line") +
  scale_x_date(labels = date_format("%m-%y"), breaks = "3 months")

替代使用多个geoms但没有图例：

ggplot(Full.df, aes(x = Month)) +
  stat_summary(aes(y = Count.S), colour = "blue", fun.y = sum, geom = "line") +
  stat_summary(aes(y = Count.G), colour = "red", fun.y = sum, geom = "line") +
  stat_summary(aes(y = Count.W), colour = "green", fun.y = sum, geom = "line") +
  stat_summary(aes(y = Count.F), colour = "orange", fun.y = sum, geom = "line") +
  scale_x_date(labels = date_format("%m-%y"), breaks = "3 months")

在R中绘制多变量时间序列数据

1 个答案: