Hi,
I have to use the ReadDNAStringSet function in order to extract sequences from Fasta file so i used this instruction:
filepath1 <- system.file("extdata", allgenes, package="Biostrings")
sequences <- readDNAStringSet(filepath1)
the readDNAStringSet function will extract sequences only if the input file is in the directory "extdata" of the package Biostrings? how can I resolve this problem Please?
Maybe
filepath1 = file.choose()
will help; on some platforms it pops up the familiar file navigation dialog box.