Force same scale on different phylogenetic trees

Force same scale on different phylogenetic trees

1

I am using R and ggtree to create phylogenetic trees. I would like to force the same treescale on two different trees to make it easier to compare them (As of now, one scale is at 0.001 while the other is at 0.003).

Is there a function to change this, so that the branch lengths are adjusted to a similar scale in both trees?
geom_treescale in ggtree only place the treescale on the tree and doesn’t change the branch lengths.
Maybe it is possible to normalize the branch lengths somehow?


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