An integer vector of length one or two. If length one only bases up to the percent
quantile of read lengths defined by the given value are shown. A vector of length two gives the
start and end base between which the nucleotide frequencies are plotted.
linetypes
The line types used for the four nucleotids + N, see (see ‘par’)
linecols
The colors in which the four nucleotids + N should be plotted.
xlab
The X axis label.
ylab
The Y axis label.
...
Arguments to be passed to methods, such as graphical parameters (see ‘par’).