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Using R for three-dimensional plotting of the output of a PCA
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| pc <- prcomp(~ . - Species, data = iris, scale = TRUE) | |
| library(rgl) | |
| plot3d(pc$x[,1:3], xlab="Component 1", ylab="Component 2", zlab="Component 3", type="n", box=F, axes=T) | |
| decorate3d(xlab = "x", ylab = "y", zlab = "z", | |
| box = TRUE, axes = TRUE, main = NULL, sub = NULL, | |
| top = TRUE, aspect = FALSE, expand = 1.03) | |
| spheres3d(pc$x[,1:3], radius=0.1, col=rep(c("red","green","black"), each = 50)) | |
| grid3d(c("x", "y+", "z")) | |
| text3d(pc$x[,1:3], text=rownames(pc$x), adj=1.3) |
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