[BioC] how to write fasta file of RNA sequences

[wang peter]

dear all:
         it seems writeFasta can not allow RNA sequences.


writeFasta(RNAStringSet(x, use.names=TRUE),"miRNA")
Error in function (classes, fdef, mtable)  :
  unable to find an inherited method for function "writeFasta", for
signature "RNAStringSet"


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shan gao
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