Thanks @colinbrislawn.
Yes, that's right! Like the top 10 Firmicutes, and so on...
I will try these out. In the example above, I don't think phyloseq library was used to draw the heatmaps (I could be wrong) and also, the taxonomy.qza file is in combined form (see picture). I guess I will need to use something like
parse_taxonomy(taxonomy, tax_sep, trim_extra)
to first separate the taxa and then use the code you recommended?
But if I did this, it would impact the Y-axis of the original heatmap I've already developed using the tutorial. I don't know if I am explaining it correctly... basically the way that the data needs to be arranged for phyloseq library is different from what's on this tutorial (or maybe I am wrong?). And so, I am trying to figure out if I can use one or the other to create these additional heatmaps. I would really appreciate your advice on this! Thanks!