frequencies of the DNA bases from a pair of sequences.
}
\usage{
-base.freq(x, freq = FALSE)
+base.freq(x, freq = FALSE, all = FALSE)
Ftab(x, y = NULL)
}
\arguments{
\item{y}{a vector with a single DNA sequence.}
\item{freq}{a logical specifying whether to return the proportions
(the default) or the absolute frequencies (counts).}
+ \item{all}{a logical; by default only the counts of A, C, G, and T are
+ returned. If \code{all = TRUE}, all counts of bases, ambiguous codes,
+ missing data, and alignment gaps are returned.}
}
\details{
The base frequencies are computed over all sequences in the