Sometimes when some group of samples is significantly different from others it is not due to the presence of some specific OTU’s, but because of absence of some OTU’s that are very common in all other groups, but absent in this.
Do we have any analysis that highlight those?
Like lefse highlight otu’s that are specific for given group, but the one that would highlight those the absence of which is specific?
Or the one that shows both tipes of peculiarities. With + and -.