Superimpose PCA plot

[Veerendra Kumar]

Dear All

I want to plot residue wise contribution to PCs. I am able to plot the residue vs individual PCs (PC1-3). using:

plot.bio3d(pc.xray$au[,2], resno=ref.pdb, sse=ref.pdb, ylab="PC1")

However, I want all three PCs together (different color) in a single plot. I mean on X axis amino acids and on Y axis PC values for PC1-3. 

How can I do that? 

Thank you

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[Xinqiu Yao]

Use the R basic function lines() to add lines to an existing plot. For example,

plot.bio3d(pc.xray$au[, 1], resno=ref.pdb, sse=ref.pdb, ylab="PCs")
lines(pc.xray$au[, 2], col="red")
lines(pc.xray$au[, 3], col="blue") 

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