怎样绘出高级感的图形?ggdark

小伙伴们有没有发现,一些展示图更换背景后会看起来比较有质感呢~今天介绍一个可以更换图片背景的R包——ggdark

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install.packages("ggdark")   #安装包
library(ggdark)

1.例1

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p <- ggplot(diamonds) +
  geom_point(aes(carat, price, color = cut)) +
  scale_y_continuous(label = scales::dollar) +
  guides(color = guide_legend(reverse = TRUE)) +
  labs(title = "Prices of 50,000 round cut diamonds by carat and cut",
       x = "Weight (carats)",
       y = "Price in US dollars",
       color = "Quality of the cut")

(1)

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 p + theme_gray()  # 基础参数

(2)

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p+dark_theme_gray() #背景变黑色

(3)

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p + dark_theme_gray(base_family = "Fira Sans Condensed Light", base_size = 14) + 
  theme(plot.title = element_text(family = "Fira Sans Condensed"),
        plot.background = element_rect(fill = "grey10"),  #设置背景颜色grey10
        panel.background = element_blank(),  #去掉原图形背景色
        panel.grid.major = element_line(color = "grey30", size = 0.2),  #修改格子主线颜色
        panel.grid.minor = element_line(color = "grey30", size = 0.2),  #修改格子辅线颜色
        legend.background = element_blank(),   #删除图例中标注文字的颜色
        axis.ticks = element_blank(),    #删除刻度
        legend.key = element_blank(),   #删除图例中图形的背景颜色
        legend.position = c(0.815, 0.27)  #调整标签位置
)

2.例2,ggplot2几种不同的主题,背景变黑色展示:

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mtcars2 <- within(mtcars, {
  vs <- factor(vs, labels = c("V-shaped", "Straight"))
  am <- factor(am, labels = c("Automatic", "Manual"))
  cyl  <- factor(cyl)
  gear <- factor(gear)
})

p <- ggplot(mtcars2) +
geom_point(aes(wt, mpg, color = gear)) +
facet_grid(vs ~ am) +
labs(title = "Fuel economy declines as weight increases",
subtitle = "(1973-74)",
caption = "Data from the 1974 Motor Trend US magazine.",
x = "Weight (1000 lbs)",
y = "Fuel economy (mpg)",
color = "Gears")

(1)

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p + dark_theme_gray()

(2)

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p + dark_theme_bw()  #删除背景色

(3)

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p + dark_theme_linedraw()

(4)

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p + dark_theme_light()

(5)

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p + dark_theme_dark()

(6)

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p + dark_theme_minimal()

(7)

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p + dark_theme_classic()

(8)

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p + dark_theme_void()

3. 介绍几种其他的主题颜色

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install.packages("ggthemes")
library(ggthemes)

p <- ggplot(subset(gapminder, continent != "Oceania")) +
geom_line(aes(year, lifeExp, group = country, color = country), lwd = 1, show.legend = FALSE) +
facet_wrap(~ continent) +
scale_color_manual(values = country_colors) +
labs(title = "Life expectancy has increased worldwide")

(1)

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 p + theme_fivethirtyeight()
#著名民调网站FiveThirtyEight使用的配色方案

(2)

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p + theme_economist()
#《经济学人》使用的配色方案

(3)

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p + theme_wsj()
#《华尔街日报》使用的配色方案

(4)

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p + dark_mode(theme_fivethirtyeight())  
#将theme_fivethirtyeight()主题变成黑色背景

(5)

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p + dark_mode(theme_wsj())  #将theme_wsj()主题变成黑色背景

小编总结:

很多时候我们只要更改插图的颜色或背景颜色 ,文章就会展现出不同的风格效果,小伙伴们可以借鉴一下呀~