ggbiplot - change the group color and marker
问题 In the example ggbiplot script plot there are 3 groups, how can I change the marker colors and shapes? library(ggbiplot) data(wine) wine.pca <- prcomp(wine, scale. = TRUE) ggbiplot(wine.pca, obs.scale = 1, var.scale = 1, group=wine.class, varname.size = 3, labels.size=3, ellipse = TRUE, circle = TRUE) + scale_color_discrete(name = '') + geom_point(aes(colour=wine.class), size = 3) + theme(legend.direction ='horizontal', legend.position = 'top') 回答1: The following works for me. ggbiplot(wine