在图例上加点 geom_vline

Make dotted geom_vline on legend

我正在尝试为一系列情节制作传奇。 我只需要图例,而不是实际的图表,因为我正在单独创建它们并且已经为它们设置了正确的格式。然后我会添加这个通用图例。

目前我有分开的 2 条不同颜色线条的代码,但我最好有一条红色直线和一条红色虚线。但是,我不能在其中一个上划线并且都变成红色。目前代码有一个为红色,另一个为紫色。都是直线。

这是它的样子:

# libraries
library(readr)  # for function file.path
library(dplyr)
library(ggplot2)
library(tidyverse)
library(cowplot)
library(gridExtra)
library(extrafont)

legend <- data %>%
  ggplot(aes_string(x='DateTime', y='Rel_mAOD')) +
  geom_line() + 
  theme_classic() +
  geom_vline(aes(xintercept=as.POSIXct('2020-11-03 01:00:00'), 
                 col='red'), size=2) +
  geom_vline(aes(xintercept=as.POSIXct('2021-11-01 01:00:00'), 
                 col='purple'),linetype=2, size=2, showguide=TRUE) +
  scale_color_manual(
    name=NULL, 
    values=c('red','purple'), 
    labels=c('Release', 'Main')) +
  theme(legend.direction='horizontal',
        legend.position='top', 
        legend.text=element_text(size=30, margin=margin(r=1, unit='inch')),
        legend.spacing.x=unit(0.5, 'inch')) +
  guides(fill=guide_legend(
    keywidth=6, 
    keyheight=6, 
    default.unit='inch'))

my_legend<-get_legend(legend)
plot(my_legend)

使用scale_linetype_manual,将两条线都涂成红色:

  ggplot() +
  theme_void() +
  geom_vline(aes(xintercept=as.POSIXct('2020-11-03 01:00:00'), 
                 linetype = '1', ), size=1.5, color = "red") +
  geom_vline(aes(xintercept=as.POSIXct('2021-11-01 01:00:00'), 
                 linetype = '2'), size=1.5, color = "red") +
  scale_linetype_manual(name = NULL,
                        values = c(1, 2), labels = c('Release', 'Main')) +
  theme(legend.direction='horizontal',
        legend.position='top', 
        legend.text=element_text(size=40, margin=margin(r=1, unit='inch')),
        legend.spacing.x=unit(0.5, 'inch'),
        legend.box.margin = margin(50, 20, 50, 20))+
  guides(fill=guide_legend(
    keywidth=8, 
    keyheight=6, 
    default.unit='inch'))

要有额外的标签:

 ggplot() +
  theme_void() +
  geom_vline(aes(xintercept=as.POSIXct('2020-11-03 01:00:00'), 
                 linetype = '1', color = '1' ), size=1.5) +
  geom_vline(aes(xintercept=as.POSIXct('2021-11-01 01:00:00'), 
                 linetype = '2', color = '2'), size=1.5) +
  geom_vline(aes(xintercept=as.POSIXct('2020-11-03 01:00:00'), 
                 linetype = '3', color = '3'), size=1.5) +
  geom_vline(aes(xintercept=as.POSIXct('2021-11-01 01:00:00'), 
                 linetype = '4', color = '4'), size=1.5) +
  scale_color_manual(values = c("red", "red", "blue", "purple"),
                     name = NULL,
                     labels = c('Release', 'Main', "Next", "Last")) +
  scale_linetype_manual(name = NULL,
                        values = c(1, 2, 1, 1),
                        labels = c('Release', 'Main', "Next", "Last")) +
  theme(legend.direction='horizontal',
        legend.position='top', 
        legend.text=element_text(size=40, margin=margin(r=1, unit='inch')),
        legend.spacing.x=unit(0.5, 'inch'),
        legend.box.margin = margin(50, 20, 50, 20))