如何将棒棒糖图转为垂直棒棒糖图并修复Y轴标签重叠问题

关键修改说明 #

• 转垂直布局：直接移除原代码中的coord_flip()函数，让图表回到垂直形态
• 修复标签重叠：删除原代码中导致标签向左偏移的axis.text.y负margin设置，同时调整x轴分类标签的角度和对齐方式，解决长标签拥挤问题

修改后的完整代码 #

library(ggplot2)
library(ggalt)
library(scales)

df = read.csv(text="category,pct
Other,0.09
South Asian/South Asian Americans,0.12
Interngenerational/Generational,0.21
S Asian/Asian Americans,0.25
Muslim Observance,0.29
Africa/Pan Africa/African Americans,0.34
Gender Equity,0.34
Disability Advocacy,0.49
European/European Americans,0.52
Veteran,0.54
Pacific Islander/Pacific Islander Americans,0.59
Non-Traditional Students,0.61
Religious Equity,0.64
Caribbean/Caribbean Americans,0.67
Latino/Latina,0.69
Middle Eastern Heritages and Traditions,0.73
Trans-racial Adoptee/Parent,0.76
LBGTQ/Ally,0.79
Mixed Race,0.80
Jewish Heritage/Observance,0.85
International Students,0.87", stringsAsFactors = FALSE, sep = ",", header=TRUE)
 
gg = ggplot(df, aes(reorder(category, pct), pct))
gg = gg + geom_lollipop(point.colour="steelblue", point.size=3)
gg = gg + scale_y_continuous(expand=c(0,0), labels=percent,
                              breaks=seq(0, 1, by=0.2), limits=c(0, 1))
# 移除水平翻转，使用垂直布局
gg = gg + labs(x=NULL, y=NULL, 
                title="纽约州立大学科特兰分校多元文化校友调查结果",
                subtitle="按种族、族裔、祖籍及关注方向排序的核心关切领域",
                caption="数据来源：stephanieevergreen.com")
gg = gg + theme_minimal(base_family="Arial Narrow")
# 垂直图中隐藏x轴主网格线
gg = gg + theme(panel.grid.major.x=element_blank())
gg = gg + theme(panel.grid.minor=element_blank())
# 调整x轴标签：旋转45度右对齐，设置margin避免与图表重叠
gg = gg + theme(axis.text.x=element_text(angle=45, hjust=1, margin=margin(t=5)))
# 替换为x轴基线设置，删除原导致重叠的y轴标签负margin
gg = gg + theme(axis.line.x=element_line(color="#2b2b2b", size=0.15))
gg = gg + theme(plot.margin=unit(rep(30, 4), "pt"))
gg = gg + theme(plot.title=element_text(face="bold"))
gg = gg + theme(plot.subtitle=element_text(margin=margin(b=10)))
gg = gg + theme(plot.caption=element_text(size=8, margin=margin(t=10)))

gg

最终效果 #

• 图表变为垂直布局，每个分类的棒棒糖从x轴向上延伸
• x轴长标签通过旋转对齐解决拥挤问题，同时保持与图表主体的间距
• 彻底消除了标签与线条重叠的问题

内容的提问来源于stack exchange，提问作者Ed_Gravy