在双图中标记点 [英] Labeling points in a biplot

问题描述

我已经执行了 PCA 并在 R 中绘制了一个双标图.

I have performed a PCA and drawn a biplot in R.

pca1= princomp (~ data$X250 + data$X500 + data$shear, scores=TRUE, cor=TRUE, rownames=data[,1])
biplot(pca1, xlab="PC 1", ylab="PC 2", pch=20)

目前双图上的标签是行号，但我希望点标签是我的数据的绘图名称.我的数据有 81 行.

Currently the labels on the biplot are the row numbers, but I would like the point labels to be the plot names of my data. My data has 81 rows.

我试过了:

text (pca1[1:81], pca1[1:81], labels = row.names(data))
text (1:81, 1:81, labels = row.names(data))
text (pca1$comp.1[1:81], pca1$comp.2[1:81], labels = row.names(data))

推荐答案

尝试给予

rownames(data)<-data[,1] 

在使用 princomp 之前

before using princomp

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