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假设我有一个带有序数变量和一个分类变量的数据:
set.seed(35)
df <- data.frame(Class = factor(rep(c(1,2),times = 80), labels = c("Math","Science")),
StudyTime = factor(sort(sample(1:4, 16, prob = c(0.25,0.3,0.3,0.15), replace = TRUE)),labels = c("<5","5-10","10-20",">20")),
Nerd = factor(sapply(rep(c(0.1,0.3,0.5,0.8),c(30,50,50,30)), function(x)sample(c("Nerd","NotNerd"),size = 1, prob = c(x,1-x))),levels = c("NotNerd","Nerd")))
ggplot
和
geom_bar
与
x
,
fill
和
alpha
(或
color
)美学映射来可视化这些变量之间的关系。
ggplot(data = df, aes(x = Class, fill = StudyTime, alpha = Nerd)) +
geom_bar(position = "dodge", color = "black") +
scale_alpha_manual(values = c(Nerd = 0.5, NotNerd = 1)) +
scale_fill_manual(values = colorRampPalette(c("#0066CC","#FFFFFF","#FF8C00"))(4)) +
labs(x = "Class", y = "Number of Students", alpha = "Nerd?") +
theme(legend.key.height = unit(1, "cm"))
alpha
和
color
不理想。更好的选择可能是应用条纹或交叉影线等图案。
最佳答案
一种方法是使用 ggpattern
Mike FC 编写的包(无从属关系):
library(ggplot2)
#remotes::install_github("coolbutuseless/ggpattern")
library(ggpattern)
ggplot(data = df, aes(x = Class, fill = StudyTime, pattern = Nerd)) +
geom_bar_pattern(position = position_dodge(preserve = "single"),
color = "black",
pattern_fill = "black",
pattern_angle = 45,
pattern_density = 0.1,
pattern_spacing = 0.025,
pattern_key_scale_factor = 0.6) +
scale_fill_manual(values = colorRampPalette(c("#0066CC","#FFFFFF","#FF8C00"))(4)) +
scale_pattern_manual(values = c(Nerd = "stripe", NotNerd = "none")) +
labs(x = "Class", y = "Number of Students", pattern = "Nerd?") +
guides(pattern = guide_legend(override.aes = list(fill = "white")),
fill = guide_legend(override.aes = list(pattern = "none")))
geom_tile
的示例将连续变量与分类变量组合:
set.seed(40)
df2 <- data.frame(Row = rep(1:9,times=9), Column = rep(1:9,each=9),
Evaporation = runif(81,50,100),
TreeCover = sample(c("Yes", "No"), 81, prob = c(0.3,0.7), replace = TRUE))
ggplot(data=df2, aes(x=as.factor(Row), y=as.factor(Column),
pattern = TreeCover, fill= Evaporation)) +
geom_tile_pattern(pattern_color = NA,
pattern_fill = "black",
pattern_angle = 45,
pattern_density = 0.5,
pattern_spacing = 0.025,
pattern_key_scale_factor = 1) +
scale_pattern_manual(values = c(Yes = "circle", No = "none")) +
scale_fill_gradient(low="#0066CC", high="#FF8C00") +
coord_equal() +
labs(x = "Row",y = "Column") +
guides(pattern = guide_legend(override.aes = list(fill = "white")))
关于r - 如何在 ggplot 的条形图中添加影线、条纹或其他图案或纹理?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/62393159/
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