我对R和统计数据一般非常新,并且在向PCA图添加多个置信椭圆时遇到问题.
我的兴趣在于用95%置信度椭圆突出显示PCA图中的潜在分组/聚类.我已经尝试在R中使用dataEllipse函数,但是我无法弄清楚如何在PCA图中添加具有不同中心的多个椭圆(中心将位于看似包含聚类的各个点,在这种情况下是岩石源和岩性工具可能是由该来源制成的).
感谢您的帮助!{
lithic_final <- LITHIC.DATASHEET.FOR.R.COMPLETE.FORMAT
lithic_final
pca1 <- princomp(lithic_final); pca1
lithic_source <- c("A1", "A1", "A1", "A1", "A2","A2", "A2", "A3","A3","A3","B","B","B","B","B","B","C","C","C","C","C","C","C","D","D","D","D","D","D","D","D","E","E","E","E","E","E","E","E","F","F","G","G","G","G","H","H","H","H","H","H","H","I1","I1","I1","I2","I2","I2","I2","I2","J1","J1","J2","J2","J2","J2","J2","J2","J2","J2","J2","K","K","K","K","K","K","K","L","L","L","L","L","L","L","L","L","L","L","L","L","L","BB1","BB1","BB1","FC","FC","FC","JRPP","JRPP","JRPP","BB2","BB2","BB2","BB2","MWP","MWP","MWP","MWP","RPO","RPO","RPO")
lithic_source
summary(pca1)
plot(pca1)
#Plotting the scores with the Lithic Source Info
round(pca1$scores[,1:2], 2)
pca_scores <-round(pca1$scores[,1:2], 2)
plot(pca1$scores[,1], pca1$scores[,2], type="n")
text(pca1$scores[,1], pca1$scores[,2],labels=abbreviate(lithic_source, minlength=3), cex=.45)
#Plotting PCA Scores of EACH SAMPLE for PCA 2 and 3 with Lithic Source Info
round(pca1$scores[,2:3], 2)
pca2_3_scores <-round(pca1$scores[,2:3], 2)
plot(pca1$scores[,2], pca1$scores[,3], type="n")
text(pca1$scores[,2], pca1$scores[,3], labels=abbreviate(lithic_source, minlength=3), cex=.45)
#Plotting PCA Scores of EACH SAMPLE for PCA 3 …