branches_attr_by_labels 'type' options

[MaximilianStammnitz]

Hi,

I have only recently started using the various dendextend features, and haven't yet come across something that I think would be useful for some users' applications:

When adjusting col, lwd or lty in branches_attr_by_labels; could you possibly add more flexibility as to how close to the root these features shall reach? I.e., allowing for the 'type' options in branches_attr_by_labels between 'all' and 'any' to also take an integer input that indicates the number of nodes away from the root until which the branch adjustment shall act?

This may enable highlighting of distances between leaves/clusters in a given dendrogram that don't connect through the root.

Best regards, Max

[talgalili]

Hi Max, Are you referring to something like highlight_branches?

dat <- iris[1:20,-5]
hca <- hclust(dist(dat))
hca2 <- hclust(dist(dat), method = "single")
dend <- as.dendrogram(hca)
dend2 <- as.dendrogram(hca2)

par(mfrow = c(1,3))
dend %>% highlight_branches_col %>% plot(main = "Coloring branches")
dend %>% highlight_branches_lwd %>% plot(main = "Emphasizing line-width")
dend %>% highlight_branches %>% plot(main = "Emphasizing color\n and line-width")

Or something else?

[MaximilianStammnitz]

Hi Tal,

I was thinking of an example like this one:

Ideally, you should be able to opt out of highlighting the branches between root and MRCA.

[talgalili]

Hi @MaximilianStammnitz This looks very doable, but I won't get the time in the near future to write it up. You want to have a go at it? (if so - I'll be happy for a pull request)

[MaximilianStammnitz]

Hi @talgalili, I will probably get to this in the coming week.