Faster way to split a string and count characters using R?
- by chrisamiller
I'm looking for a faster way to calculate GC content for DNA strings read in from a FASTA file. This boils down to taking a string and counting the number of times that the letter 'G' or 'C' appears. I also want to specify the range of characters to consider.
I have a working function that is fairly slow, and it's causing a bottleneck in my…