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我正在尝试使用来自 https://github.com/hrbrmstr/waffle 的包 waffle
为 R 中的多面华夫饼图获得相同的自定义色标和 ggplot2::facet_wrap
。
下面是一个可重现的例子:
foo <-
data.frame(Genus = c("Hemipenthes","Thecophora","Cheilosia","Cheilosia","Chrysotoxum","Chrysotoxum","Dasysyrphus","Dasysyrphus","Didea","Episyrphus","Eristalis","Eristalis","Eumerus","Eumerus","Eupeodes","Eupeodes","Helophilus","Megasyrphus","Melanostoma","Meliscaeva","Merodon","Merodon","Myathropa","Neoascia","Parasyrphus","Parasyrphus","Platycheirus","Scaeva","Scaeva","Sphaerophoria","Sphaerophoria","Syrphus","Syrphus","Xanthandrus","Andrena","Apis","Bombus","Bombus","Ceratina","Lasioglossum","Lasioglossum","Sphecodes","Sphecodes","Polistes","Macroglossum","Macroglossum","Polyommatus","Aglais","Argynnis","Lasiommata","Lasiommata","Adscita","Thrips","Thrips"),
Ploidy = c("4x","4x","4x","8x","4x","8x","4x","8x","8x","4x","4x","8x","4x","8x","4x","8x","4x","4x","8x","4x","4x","8x","4x","8x","4x","8x","8x","4x","8x","4x","8x","4x","8x","4x","4x","8x","4x","8x","8x","4x","8x","4x","8x","8x","4x","8x","4x","8x","4x","4x","8x","4x","4x","8x"),
n = as.numeric(c("2","2","0","0","38","0","2","0","0","0","569","35","0","0","63","8","0","2","3","4","20","1","2","1","17","0","2","9","0","21","4","48","61","1","25","15","0","0","0","38","5","0","0","0","0","0","4","1","0","21","2","1","0","0")),
stringsAsFactors = F)
foo$Genus <- factor(foo$Genus, levels = unique(foo$Genus))
foo$Ploidy <- factor(foo$Ploidy, levels = c("4x", "8x"))
bar <-
data.frame(Genus = c("Hemipenthes","Thecophora","Cheilosia","Chrysotoxum","Dasysyrphus","Didea","Episyrphus","Eristalis","Eumerus","Eupeodes","Helophilus","Megasyrphus","Melanostoma","Meliscaeva","Merodon","Myathropa","Neoascia","Parasyrphus","Platycheirus","Scaeva","Sphaerophoria","Syrphus","Xanthandrus","Andrena","Apis","Bombus","Ceratina","Lasioglossum","Sphecodes","Polistes","Macroglossum","Polyommatus","Aglais","Argynnis","Lasiommata","Adscita","Thrips"),
colour = c("#F2F5EA","#E6ECD5","#DAE2C0","#CED9AC","#C2CF97","#B5C682","#A9BC6E","#9DB359","#91A944","#85A030","#79961B","#739211","#6E8B10","#69850F","#647E0E","#5F780E","#5A720D","#556B0C","#50650B","#4B5F0B","#46580A","#415209","#3C4C08","#F4C0B7","#E98170","#DE4328","#d92405","#BA1E04","#9B1903","#7C1402","#7897F1","#3563EB","#3563eb","#2C52C3","#23429C","#1A3175","#eac124"),
stringsAsFactors = F)
bar$Genus <- factor(bar$Genus, levels = unique(bar$Genus))
调色板看起来像这样:
barplot(rep(1, nrow(bar)), col = bar$colour, names.arg = bar$Genus, las = 2, cex.names = .75)
请注意,两个数据集中值的顺序和级别都相同:
all(unique(foo$Genus) == unique(bar$Genus))
TRUE
我现在将两个数据集连接在一起:
foobar <- plyr::join(foo, bar) # preserves row order
然后我用华夫饼绘制这个:
library(ggplot)
library(waffle)
library(hrbrthemes)
ggplot(foobar, aes(fill = Genus, values = n)) +
geom_waffle(colour = "white", n_rows = 20, flip = T) +
facet_wrap(.~Ploidy, nrow = 1, strip.position = "bottom") +
scale_fill_manual(values = foobar$colour, name = NULL) +
scale_x_discrete() +
scale_y_continuous(labels = function(x) x * 20, expand = c(0,0)) +
coord_equal() +
theme_minimal(base_family = "Roboto Condensed") +
theme(panel.grid = element_blank(), axis.ticks.y = element_line()) +
guides(fill = guide_legend(reverse = T))
但是,颜色不对应于指定的填充(属
)。例如,绘制的图例的前 4 个条目(Adscita、Lasiommata、Aglais、Polyommatus)应该是蓝色阴影,而不是绿色。此外,某些级别的 Genus
已完全删除,例如 Cheilosia、Bombus 和 Didea。使用其他 geom 或删除 facet 时,此行为仍然存在。
期望的结果是使 Genus
变量的每个唯一值在两个方面具有相同的颜色,如在 bar
中的自定义调色板中分配并在中可视化上面的条形图。
最佳答案
这就是你想要的?使用 scale_fill_identity(drop = FALSE)
通常最好只使用您的变量进行审美,然后使用 scale_..._manual
中的命名向量将颜色映射到它。我现在已经将命名向量添加为标签。 drop = FALSE
显示未使用的级别
library(ggplot2)
#devtools::install_github("hrbrmstr/waffle")
library(waffle)
a <- unique(as.character(foobar$Genus))
names(a) <- unique(foobar$colour)
ggplot(foobar, aes(fill = colour, values = n)) +
geom_waffle(colour = "white", n_rows = 20, flip = T) +
facet_wrap(.~Ploidy, nrow = 1, strip.position = "bottom") +
scale_fill_identity(guide = 'legend', labels = a, drop = FALSE) +
labs(fill = 'Genus') +
scale_y_continuous(labels = function(x) x * 20, expand = c(0,0)) +
coord_equal()
由 reprex package 创建于 2020-03-06 (v0.3.0)
关于r - 多面 ggplot 华夫饼图中的手动色标,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/60566001/
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