plottype
If plottype="persample", each sample is plotted in a separate plot displaying abundance of byotype in genome, percentage of biotype detected by sample and abundance of biotype in sample.
If plottype="comparison", two samples can be compared in the same plot. Two plots are generated, one for the percentage of biotype detected by each of the compared samples, and the other
for the abundance of the biotypes within the compared samples.
toplot
If plottype="comparison" and a biotype is specified in this argument (by default toplot="protein_coding"), a proportion test is performed to test if the abundance of that biotype
is significantly different for the two samples being compared.