[BioC] is matchPattern faster?

[wang peter]

i have some reads from illumina sequencer
there are some "N" in the reads
i want to find the last "N" in the first 6 bp of the sequence
so do you think matchPattern is faster ? or other low-level match methods?

	reads <- readFastq(fastqfile)
	seqs <- sread(reads);
                  matchPattern("N", seqs)



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shan gao
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