R将ggplot与数据帧列表一起使用

时间:2019-05-31 16:16:59

标签: r list dataframe ggplot2 plot

我有一个要用ggplot绘制的数据帧列表(df_list)。我想在x刻度上显示日期(当然,它总是相同),然后在2个不同的geo_lines上显示。 df1-3中的第一个地线和abc中的第二个地线。这是一个代码示例:

library(lubridate)
v1 = seq(ymd('2000-05-01'),ymd('2000-05-10'),by='day')
v2 = seq(2,20, length = 10)
v3 = seq(-2,7, length = 10)
v4 = seq(-6,3, length = 10)
df1 = data.frame(Date = v1, df1_Tmax = v2, df1_Tmean = v3, df1_Tmin = v4)

v1 = seq(ymd('2000-05-01'),ymd('2000-05-10'),by='day')
v2 = seq(3,21, length = 10)
v3 = seq(-3,8, length = 10)
v4 = seq(-7,4, length = 10)
df2 = data.frame(Date = v1, df2_Tmax = v2, df2_Tmean = v3, df2_Tmin = v4)

v1 = seq(ymd('2000-05-01'),ymd('2000-05-10'),by='day')
v2 = seq(4,22, length = 10)
v3 = seq(-4,9, length = 10)
v4 = seq(-8,5, length = 10)
df3 = data.frame(Date = v1, df3_Tmax = v2, df3_Tmean = v3, df3_Tmin = v4)

v1 = seq(ymd('2000-05-01'),ymd('2000-05-10'),by='day')
v2 = seq(2,20, length = 10)
v3 = seq(-2,8, length = 10)
v4 = seq(-6,3, length = 10)
abc = data.frame(Date = v1, ABC_Tmax = v2, ABC_Tmean = v3, ABC_Tmin = v4)

df_list = list(df1, df2, df3, abc)
names(df_list) = c("df1", "df2", "df3", "abc")

例如,我想将df_list$df1$df1_Tmaxdf_list$abc$ABC_Tmax一起绘制。

我尝试过:

ggplot(data = df_list, aes(x = df1$Date)) +
  geom_line(aes(y = df1$df1_Tmax), color = "darkgreen", size = 1) +
  geom_line(aes(y = abc$ABC_Tmax), color = "grey27", size = 1) +
  labs(title="Title", 
       subtitle="subtitle", 
       x = "day", 
       y = "T") +
  scale_x_date(date_labels="%d",date_breaks  ="1 day")

但是我收到此错误消息:

Error: `data` must be a data frame, or other object coercible by `fortify()`, not a list

有什么办法解决这个问题吗?

1 个答案:

答案 0 :(得分:1)

您可以尝试一下。

library(ggplot2)
ggplot(data = cbind(df_list$df1, df_list$abc), aes(x = Date)) +
  geom_line(aes(y = df1_Tmax), color = "darkgreen", size = 1) +
  geom_line(aes(y = ABC_Tmax), color = "grey27", size = 1) +
  labs(title="Title", 
       subtitle="subtitle", 
       x = "day", 
       y = "T") +
  scale_x_date(date_labels="%d",date_breaks  ="1 day")

只需使用cbind函数中的cbind(df_list$df1, df_list$abc),即ggplot生成新的数据帧。

注意: cbind(df_list$df1, df_list$abc)导致以下错误。

  

错误:data必须具有唯一的名称,但具有重复的列

请尝试执行此操作,因为在这两个数据框中也有相同的Date变量。