如何将ggplot2中的线条图和条形图与一个分组变量结合起来？

Question

我的数据框只有一个分组变量。是否可以在一个ggplot2图表中组合条形和线条而无需重新排列数据框？

这是我的数据框：

df <- structure(list(month = structure(c(1L, 2L, 3L, 4L, 5L, 6L, 7L, 
8L, 9L, 10L, 11L, 12L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 
11L, 12L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 
1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L), .Label = c("2017-01", 
"2017-02", "2017-03", "2017-04", "2017-05", "2017-06", "2017-07", 
"2017-08", "2017-09", "2017-10", "2017-11", "2017-12"), class = "factor"), 
    score = c(16610.726, 16220.9266093333, 13499.64666, 7197.6127, 
    13558.9922, 13757.1462857143, 17569.2874603175, 12316.9047619048, 
    10314.1709666667, 20670.2728, 9581.31135238095, 12197.9578666667, 
    14381.7804, 11041.6698, 14180.1408, 17538.8314444444, 20716.3987333333, 
    7478.66444444445, 3583.57866666667, 9729.769, 8947.99733333333, 
    16408.5435, 10113.3729666667, 6295.22277777778, 11087.181456763, 
    10501.219568, 10740.9389444, 9589.42535569615, 8731.001856, 
    14532.887226, 6201.22673333333, 6240.31210733333, 13252.18944, 
    21895.158224, 26057.8897973333, 15196.561848, 8243.45971166667, 
    11167.29269775, 8123.32673125, 8235.66809083333, 3770.88105441667, 
    6959.3694075, 3961.0981325, 7193.83911675, 7495.817416, 9350.171163, 
    12899.7255705, 12052.6313529528), group = c("group1", "group1", 
    "group1", "group1", "group1", "group1", "group1", "group1", 
    "group1", "group1", "group1", "group1", "group2", "group2", 
    "group2", "group2", "group2", "group2", "group2", "group2", 
    "group2", "group2", "group2", "group2", "group3", "group3", 
    "group3", "group3", "group3", "group3", "group3", "group3", 
    "group3", "group3", "group3", "group3", "group4", "group4", 
    "group4", "group4", "group4", "group4", "group4", "group4", 
    "group4", "group4", "group4", "group4")), row.names = c(NA, 
-48L), .Names = c("month", "score", "group"), class = "data.frame")

这是仅显示线条的图表：

ggplot(df, aes(x = month, y = score,group=group,colour=group)) +
  geom_line(size=0.5) +
  geom_point(size = 1.5) + theme(axis.text.x = element_text(angle = 45),legend.position="bottom")

结果如下：

现在我希望第3行和第4行是条形而不是线条。这可能与数据框一样吗？

Answer 1

您必须在每个geom中指定数据，例如：

ggplot() +
  geom_bar(data=filter(df, group %in% c("group3", "group4")), aes(x = month, y = score, fill=group) , stat ="identity", position="dodge")+
  geom_point(data=filter(df, group %in% c("group1", "group2")),aes(x = month, y = score,colour=group)) +
  geom_line(data=filter(df, group %in% c("group1", "group2")), aes(x = month, y = score,colour=group, group=group)) +
  theme(axis.text.x = element_text(angle = 45),legend.position="bottom") +
  scale_fill_manual(values = ggcolors(4)[3:4])