GGPlot2 预设 - 创建具有某些 ggplot2 美学选项的函数

Question

我现在正在创建很多情节。由于它们都针对相同的演示文稿，因此在我选择的外观选项方面它们有很多共同点。

df1 <- data.frame(name = c("name1","name2","name3","name4"),
                  variable = c("var1","var1","var2","var2"),
                  value = c(15,16,17,18))

df1 %>%
  ggplot(aes(x = name, y = value, fill = variable)) +
  geom_bar(stat = "identity", position = position_stack()) +
  labs(title = "Plot Title",
       subtitle = "month 1",
       x="",
       y="Count") +
  scale_fill_viridis_d(name = "", option = "inferno", begin = 0.3, end = 0.7, direction = -1) +
  scale_shape_tableau() +
  theme_economist() +
  theme(plot.background = element_rect(fill = "white"), 
        plot.title = element_text(hjust = 0.5),
        plot.subtitle = element_text(hjust = 0.5),
        axis.text.x = element_text(angle = 45, vjust = 1, hjust = 1),
        plot.margin = unit(c(1,1,1,1), "cm"))

本着减少代码行数的思路，有没有办法创建一个带有其中一些选项的函数，例如“theme”、“theme_economist”、“scale_shape", "scale_fill"?然后我可以为每个情节指定美学和实验室，其余的只是一个“+预设功能”，添加主题、颜色和形状。

Answer 1

您可以将要添加到绘图中的内容存储在列表中。然后，您可以通过将其添加到绘图中来重新使用此列表。

library(ggplot2)
library(ggthemes)
library(magrittr)

common_options <- list(
  scale_fill_viridis_d(name = "", option = "inferno", begin = 0.3, end = 0.7, direction = -1),
  scale_shape_tableau(),
  theme_economist(),
  theme(plot.background = element_rect(fill = "white"), 
        plot.title = element_text(hjust = 0.5),
        plot.subtitle = element_text(hjust = 0.5),
        axis.text.x = element_text(angle = 45, vjust = 1, hjust = 1),
        plot.margin = unit(c(1,1,1,1), "cm"))
)



df1 <- data.frame(name = c("name1","name2","name3","name4"),
                  variable = c("var1","var1","var2","var2"),
                  value = c(15,16,17,18))

df1 %>%
  ggplot(aes(x = name, y = value, fill = variable)) +
  geom_bar(stat = "identity", position = position_stack()) +
  labs(title = "Plot Title",
       subtitle = "month 1",
       x="",
       y="Count") +
  common_options

^{由 reprex package (v1.0.0)}

于 2021-07-20 创建

GGPlot2 预设 - 创建具有某些 ggplot2 美学选项的函数

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