This function reads DNA sequences in a file, and returns a list of DNA
sequences with the names of the taxa read in the file as names of the
vectors of the list.
a file name specified by either a variable of mode character,
or a double-quoted string.
format
a character string specifying the format of the DNA
sequences. Two choices are possible: "interleaved" or
"sequential".
skip
the number of lines of the input file to skip before
beginning to read data.
nlines
the number of lines to be read (by default the file is
read untill its end).
comment.char
a single character, the remaining of the line
after this character is ignored.
Value
A list a DNA sequences each made of a single vector of mode character
where each element is a nucleotide.
Details
This function tries to be as flexible as possible with respect to the
presentation of the sequences. There is no restriction on the lengths
of the taxa names.