目录
玫瑰图
数据格式
绘图基础
绘图升级（文本调整）
玫瑰图
下载数据data/2020/2020-11-24 · mirrors_rfordatascience/tidytuesday - 码云 - 开源中国 (gitee.com)
R语言绘图—南丁格尔玫瑰图 - 知乎 (zhihu.com)
数据格式
rm(list = ls())
library(ggplot2)
library(dplyr)
library(stringr)
hike_data <- readRDS("hike_data.rds")
hike_data$region <- as.factor(word(hike_data$location, 1, sep = " -- "))
hike_data$length_num <- as.numeric(sapply(strsplit(hike_data$length, " "), "[[", 1))
plot_df <- hike_data %>%
group_by(region) %>% ##按照region列进行分组
summarise(sum_length = sum(length_num), mean_gain = mean(as.numeric(gain)),
n = n()) %>% ##每个分组计算总长度(sum_length)、平均增益(mean_gain)和数量(n)
mutate(mean_gain = round(mean_gain, digits = 0))#对mean_gain列进行舍入操作，保留0位小数
plot_df
# A tibble: 11 × 4
region sum_length mean_gain n
1 Central Cascades 2131. 2260 226
2 Central Washington 453. 814 80
3 Eastern Washington 1334. 1591 143
4 Issaquah Alps 383. 973 77
5 Mount Rainier Area 1602. 1874 196
6 North Cascades 3347. 2500 301
7 Olympic Peninsula 1700. 1572 209
8 Puget Sound and Islands 810. 452 191
9 Snoqualmie Region 1915. 2206 219
10 South Cascades 1630. 1649 193
11 Southwest Washington 825. 1185 123
绘图基础
p1 <- ggplot(data = plot_df,aes(
x = reorder(str_wrap(region, 5), sum_length),##x变量region，str_wrap()将region换行,按照sum_length排序
y=sum_length,fill = region))+ ##fill = region 根据这个进行颜色填充
geom_bar(width = 0.8,stat = "identity")+ #条形图
coord_polar(theta="x",start=0)+ #坐标系 theta将角度映射到的变量（x或y）
ylim(-500,3500)+ ##根据最大值设置合适的圆环直径
scale_fill_viridis(option="A",discrete=T)+
theme_minimal()+xlab(" ")+ylab(" ")+ ##主题
labs(title = "玫瑰图",
subtitle = paste( "Florence NightingaleA","Florence NightingaleB", sep = "\n"),
caption = "2024")+
theme(legend.position="none")##不展示图例
p1
dev.off()
绘图升级（文本调整）
计算角度
rm(list = ls())
library(ggplot2)
library(dplyr)
library(stringr)
library(viridis)
hike_data <- readRDS("hike_data.rds")
hike_data$region <- as.factor(word(hike_data$location, 1, sep = " -- "))
hike_data$length_num <- as.numeric(sapply(strsplit(hike_data$length, " "), "[[", 1))
plot_df <- hike_data %>%
group_by(region) %>% ##按照region列进行分组
summarise(sum_length = sum(length_num), mean_gain = mean(as.numeric(gain)),
n = n()) %>% ##每个分组计算总长度(sum_length)、平均增益(mean_gain)和数量(n)
mutate(mean_gain = round(mean_gain, digits = 0))#对mean_gain列进行舍入操作，保留0位小数
##需要对文本角度进行计算## 需要先进行排序计算
plot_df1 <- as.data.frame(plot_df)
##值从大到小降序排列
plot_df2 <- plot_df1[order(plot_df1$sum_length,decreasing=T),c(1:2)]
label_data<-plot_df2
library(data.table)
setDT(label_data)#构造文本
label_data[,new_label:=paste0(region,sum_length,"例")] ##添加文本内容
label_data[,id:=1:nrow(label_data)] ##添加排序号（已经降序排列）
number_of_bar <- nrow(label_data) ##行数量用于计算角度
label_data[,angle:=90 - 360 * (label_data$id-0.5) /number_of_bar] #角度计算
label_data[,":="(hjust=ifelse(angle<90,1,0),
angle1=ifelse(angle<90,angle+180,angle))]
head(label_data)[1:3]
region sum_length new_label id angle hjust angle1
1: North Cascades 3346.53 North Cascades3346.53例 1 73.636364 1 253.6364
2: Central Cascades 2130.85 Central Cascades2130.85例 2 40.909091 1 220.9091
3: Snoqualmie Region 1915.32 Snoqualmie Region1915.32例 3 8.181818 1 188.1818
p1 <- ggplot(data = plot_df,aes(
##一定注意reorder(str_wrap(region, 5), sum_length,decreasing=T)顺序与计算角度顺序需要一致
x = reorder(str_wrap(region, 5), sum_length,decreasing=T),##x变量region，str_wrap()将region换行,按照sum_length排序
y=sum_length,fill = region))+ ##fill = region 根据这个进行颜色填充
geom_bar(width = 0.8,stat = "identity")+ #条形图
coord_polar(theta="x",start=0)+ #坐标系 theta将角度映射到的变量（x或y）
ylim(-500,3500)+ ##根据最大值设置合适的圆环直径
scale_fill_viridis(option="A",discrete=T)+
theme_minimal()+xlab(" ")+ylab(" ")+ ##主题
labs(title = "玫瑰图", subtitle = paste( "Florence NightingaleA","Florence NightingaleB", sep = "\n"), caption = "2024")+
theme(legend.position = "none", #不展示图例
text = element_text(color = "gray12", family = "Bell MT"), #参数https://www.jianshu.com/p/8e33dc11ed8c
axis.text = element_blank(),
axis.title = element_blank(),
panel.grid = element_blank())+
geom_text(data=label_data,
aes(x=id, y= sum_length,
label=new_label,
hjust=hjust),
color="black", fontface="bold",
alpha=0.6, size=3.5,
angle=label_data$angle1,inherit.aes=FALSE)
p1
dev.off()
参考：
1：南丁格尔玫瑰图 With ggplot2【R语言】_r语言玫瑰图-CSDN博客
2：R语言绘图—南丁格尔玫瑰图 - 知乎 (zhihu.com)
雷达图学习：R实战| 雷达图(Radar Chart)-CSDN博客
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