当我使用 as.dendrogram 时，叶子的标签没有完全显示

Question

当我使用 "as.dendrogram" 绘制树状图时，所有叶标签都被切掉了。请参阅下面的链接图片作为示例：

当我使用 "hclust" 绘图时（所有标签均正确显示） Dendrogram 1

当我使用 "as.dendrogram" 绘图时 Dendrogram 2

代码：

我创建的数据只是为了说明问题

test <- matrix(c(34,34,32,27,12,1,2,1,1,1), ncol=2)
colnames(test) <- c('Variable1', 'Variable2')
rownames(test) <- c('African Forest Elephant', 'Asian Domestic Elephant','African White Rhino','West African Giraffe','African Mountain Gorilla')
test_table <- as.table(test)

绘制第一个链接图像

hctest = hclust(dist(test_table))
plot(hctest, axes = FALSE)

第二个

hctest = as.dendrogram(hctest)
plot(hctest, edge.root = TRUE, horiz = TRUE)

PS：如果我使用 "horiz = FALSE"，同样的问题仍然存在。我尝试导出图像并尝试使用 R markdown，但没有任何变化。

Answer 1

您可以通过 par 调整绘图边距 mar=c(bottom, left, top, right) 来解决此问题。（默认值为 c(5, 4, 4, 2) + 0.1）。

par(mar=c(5, 4, 4, 10) + 0.1)
plot(hctest, edge.root=TRUE, horiz=TRUE)

数据

hctest <- structure(list(structure(5L, members = 1L, height = 0, label = "African Mountain Gorilla", leaf = TRUE), 
    structure(list(structure(4L, members = 1L, height = 0, label = "West African Giraffe", leaf = TRUE), 
        structure(list(structure(3L, members = 1L, height = 0, label = "African White Rhino", leaf = TRUE), 
            structure(list(structure(1L, label = "African Forest Elephant", members = 1L, height = 0, leaf = TRUE), 
                structure(2L, label = "Asian Domestic Elephant", members = 1L, height = 0, leaf = TRUE)), members = 2L, midpoint = 0.5, height = 1)), members = 3L, midpoint = 0.75, height = 2.23606797749979)), members = 4L, midpoint = 0.875, height = 7.07106781186548)), members = 5L, midpoint = 0.9375, height = 22.0227155455452, class = "dendrogram")

当我使用 as.dendrogram 时，叶子的标签没有完全显示

The leaf's labels aren't showing completely when I use as.dendrogram

r

label

axis-labels

hierarchical-clustering

hclust