Return Position Indices of a Short Sequence Motif Within a Larger Sequence.
a character vector of the short sequence motif.
a character vector of the larger sequence.
The sequence and the motif can be given as a either a multiple or
single element character vector. The dot character and other valid
regexpr characters are allowed in the motif, see examples.
Returns a vector of position indices within the sequence where the motif was found, see examples.
Grant, B.J. et al. (2006) Bioinformatics 22, 2695--2696.