使用`ggplot2`绘制dataframe的列返回空图

iezvtpos 于 2023-06-19 发布在其他

关注(0)|答案(2)|浏览(90)

下面是一个dataframe prop_data：

structure(list(Month = structure(1:10, levels = c("January", 
"February", "March", "April", "May", "June", "July", "August", 
"September", "October", "November", "December"), class = "factor"), 
    `Count false` = c(3211L, 2293L, 2051L, 1689L, 1203L, 580L, 
    638L, 394L, 227L, 108L), False = c(0.946918313181952, 0.965880370682393, 
    0.948220064724919, 0.964041095890411, 0.961630695443645, 
    0.952380952380952, 0.987616099071207, 0.985, 0.934156378600823, 
    0.931034482758621), `Count true` = c(180L, 81L, 112L, 63L, 
    48L, 29L, 8L, 6L, 16L, 8L), True = c(0.0530816868180478, 
    0.0341196293176074, 0.0517799352750809, 0.035958904109589, 
    0.0383693045563549, 0.0476190476190476, 0.0123839009287926, 
    0.015, 0.065843621399177, 0.0689655172413793)), class = "data.frame", row.names = c(NA, 
-10L))

我想用不同的颜色和标签在同一个图中绘制变量False和True。我想用ggplot2。下面的代码

library(ggplot2)

ggplot(prop_data, aes(x = Month)) +
  geom_line(aes(y = `False`, color = "False"), size = 1.2) +
  geom_line(aes(y = `True`, color = "True"), size = 1.2) +
  labs(title = "Trend", x = "Month", y = "Proportions") +
  scale_color_manual(values = c("False" = "blue", "True" = "red")) +
  theme_minimal()

不起作用（图形为空）。

来源：https://stackoverflow.com/questions/76416968/plotting-columns-of-a-dataframe-with-ggplot2-return-an-empty-graph

2条答案

按热度按时间

d7v8vwbk1#

除了TarJae的答案之外，我还建议在绘制数据之前使用pivot_longer：

prop_data |> 
  pivot_longer(cols = c("True", "False")) |> 
  ggplot(aes(x = Month)) +
  geom_line(aes(y = value, color = name, group = name), size = 1.2) +
  labs(title = "Trend", x = "Month", y = "Proportions") +
  scale_color_manual(values = c("False" = "blue", "True" = "red")) +
  theme_minimal()

这就避免了对geom_line()的重复调用，意味着您不必手动输入颜色值-它们是根据数据中的值提取的。

赞(0）回复(0）举报 2023-06-19

bhmjp9jg2#

我们必须使用group=1来绘制线条：

ggplot(prop_data, aes(x = Month, group=1)) +
  geom_line(aes(y = `False`, color = "False"), size = 1.2) +
  geom_line(aes(y = `True`, color = "True"), size = 1.2) +
  labs(title = "Trend", x = "Month", y = "Proportions") +
  scale_color_manual(values = c("False" = "blue", "True" = "red")) +
  theme_minimal()

赞(0）回复(0）举报 2023-06-19

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使用`ggplot2`绘制dataframe的列返回空图

2条答案

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