当我使用as.dendrogram时，叶子的标签没有完全显示出来

Question

当我用"as.dendrogram“绘制树状图时，所有的叶子标签都会被剪掉。请参阅下面的链接图像作为示例：

当我使用"hclust“(所有标签正确显示)绘图时，树状图1

当我用"as.dendrogram“测图2绘图时

代码：

我创建的数据只是为了显示问题

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。我试着导出图像，也尝试使用R标记，但是没有什么改变。

Answer 1

您可以通过调整绘图边距( par ) mar=c(bottom, left, top, right)来修复此问题。(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)

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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")