Your strand factor only has level "+", but should have levels "+", "-", "*". Use GenomicRanges::strand() to construct the right thing.
Martin On 4/14/19, 3:01 AM, "Bioc-devel on behalf of Dario Strbenac" <bioc-devel-boun...@r-project.org on behalf of dstr7...@uni.sydney.edu.au> wrote: Good day, Although the documentation states "Generally not used directly", I'm trying it. A small example fails because the input is evaluated to be in the wrong format, but it doesn't seem so when I look at the variable type of strand. debug(GAlignments) GAlignments("chr1", 1L, strand = Rle(factor('+')), cigar = "10M") debug: new("GAlignments", NAMES = names, seqnames = seqnames, start = pos, cigar = cigar, strand = strand, elementMetadata = elementMetadata, seqinfo = seqinfo) Browse[2]> strand factor-Rle of length 1 with 1 run Lengths: 1 Values : + Levels(1): + Browse[2]> n Error in validObject(.Object) : invalid class “GAlignments” object: 'strand(x)' must be an unnamed 'factor' Rle with no NAs (and with levels +, - and *) This looks like a false-positive to me. Also, it would increase readability if the constructor didn't run off the edge of the PDF page in the reference manual by using \preformatted. Also, I wonder why seqnames is automatically converted into a factor Rle, but strand isn't. Couldn't strand also use .asFactorRle? -------------------------------------- Dario Strbenac University of Sydney Camperdown NSW 2050 Australia _______________________________________________ Bioc-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/bioc-devel _______________________________________________ Bioc-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/bioc-devel