ggplot2 coord_polar使用填充时保留顺序 [英] ggplot2 coord_polar preserve order when using fill
本文介绍了ggplot2 coord_polar使用填充时保留顺序的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
为 aes
指定 fill
参数会导致饼图的顺序相反,因此中断/标签将不再与饼图匹配.请参见下面的示例和结果图.
Specifying the fill
argument for aes
results in a reverse order of the pie chart, so the breaks/labels wont match with pie pieces anymore. Please see the example and resulting plots below.
df = data.frame(Var1 = letters[1:5], Var2 = c(6, 31, 34, 66, 77))
df$Var1 = factor(df$Var1, levels = df$Var1, ordered = T)
# just fine, but no colors
ggplot(df, aes(x = 1,
y = Var2)) +
geom_bar(width = 1, stat = "identity") +
coord_polar(theta = "y") +
scale_fill_manual(values = c("red","green","yellow","black","white"),
guide_legend(title = "My_Title")) +
scale_y_continuous(breaks = (cumsum(df$Var2) -
df$Var2 / 2),
labels = df$Var1)
# reverse order appears
ggplot(df, aes(x = 1,
y = Var2,
fill = Var1)) +
geom_bar(width = 1, stat = "identity") +
coord_polar(theta = "y") +
scale_fill_manual(values = c("red","green","yellow","black","white"),
guide_legend(title = "My_Title")) +
scale_y_continuous(breaks = (cumsum(df$Var2) -
df$Var2 / 2),
labels = df$Var1)
推荐答案
堆叠将以相反的顺序发生(根据v2.2.0),因此我们可以使用以下代码以原始顺序进行堆叠:
Stacking will occur in reversed factor order (per v2.2.0), and therefore we can use the following code to stack in original order:
ggplot(df, aes(x = 1,
y = Var2,
fill = forcats::fct_rev(Var1))) +
geom_bar(width = 1, stat = "identity", col = 1) +
coord_polar(theta = "y") +
scale_y_continuous(breaks = (cumsum(df$Var2) -
df$Var2 / 2),
labels = df$Var1)
此外,您可以使用 geom_col
代替 geom_bar(stat ="identity")
.
Also, you may use geom_col
instead of geom_bar(stat = "identity")
.
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