extractDCasMat: Calculate dipeptide frequency matrix
In ohgane/DigestionSpecificity: Analyze Cleavage Site Specificity

Description Usage Arguments Value Examples

This function calculates a dipeptide frequency (or count) matrix from a vector of sequences.

1	extractDCasMat(seqvec, count = TRUE)

`seqvec`	A character vector of peptide/protein sequences.
`count`	Logical, default TRUE. If TRUE, returns total count of dipeptide. If FALSE, returns frequency.

A matrix of dipeptide frequency/count, with its row being the first amino acid and its column being the second amino acid.

## Not run: 
# An artificial, very short example
seq=c("AHGTYIR", "VCSDWEQLPMK", "FGGNTIPCAWMR", "QTYILMNK", "ASTEMNDNK")
dipepmat=extractDCasMat(seq)
print(dipepmat) # Note that the presence of two "NK" motifs
lattice::levelplot(dipepmat, xlab="First", ylab="Second", col.regions=heat.colors)

## End(Not run)