線性判別分析圖

Question

如何將樣本ID（行號）作為標簽添加到此LDA圖中的每個點？

library(MASS)
ldaobject <- lda(Species~., data=iris)
plot(ldaobject, panel = function(x, y, ...) points(x, y, ...),
     col = as.integer(iris$Species), pch = 20)

Answer 1

您可以在面板功能中使用text ：

library(MASS)
ldaobject <- lda(Species~., data=iris)
plot(ldaobject, 
     panel = function(x, y, ...) {
       points(x, y, ...)
       text(x,y,labels=seq_along(x),...) ## You change labels here 
      }
      ,
     col = as.integer(iris$Species), pch = 20)