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  • GoSeq -unable to calculate pwf!

    hello All!
    I am desperately trying to run this GO analysis on my RNAseq data(human samples).
    I got stuck in creating a pwf file: I have -I guess- successfully created a DE matrix, with ENS id and 0/1 as identifier of diff-non diff expressed genes.
    here is the error message I encounter
    genes
    0 1
    19004 6715
    > pwf <- nullp(genes, "hg19", "ensGene")
    Loading hg19 length data...
    Error in qr.R(qrx) :
    could not find symbol "..." in environment of the generic function
    I noticed that the ENS ids in my matrix are not into double quotes...I am not sure if it really has an effect...I have just followed the manual step by step, but I am not able to figure out why is not going through (and I am newbie in all this).
    Anybody can help?!!

    Manu
    > sessionInfo()
    R version 2.15.2 (2012-10-26)
    Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)

    locale:
    [1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

    attached base packages:
    [1] stats graphics grDevices utils datasets methods base

    other attached packages:
    [1] goseq_1.10.0 geneLenDataBase_0.99.10 BiasedUrn_1.05 edgeR_3.0.8 limma_3.14.4 BiocInstaller_1.8.3

    loaded via a namespace (and not attached):
    [1] AnnotationDbi_1.20.7 Biobase_2.18.0 BiocGenerics_0.4.0 biomaRt_2.14.0 Biostrings_2.26.3 bitops_1.0-4.2 BSgenome_1.26.1
    [8] DBI_0.2-5 GenomicFeatures_1.10.2 GenomicRanges_1.10.7 grid_2.15.2 IRanges_1.16.6 lattice_0.20-15 Matrix_1.0-12
    [15] mgcv_1.7-22 nlme_3.1-108 parallel_2.15.2 RCurl_1.95-4.1 Rsamtools_1.10.2 RSQLite_0.11.2 rtracklayer_1.18.2
    [22] stats4_2.15.2 tools_2.15.2 XML_3.96-1.1 zlibbioc_1.4.0

  • #2
    Hi,

    The description is a little vague but I think I can help troubleshoot the problem.

    1. Are you sure you are working with 'ensGene' symbols? Could your genes be better classified as something else?

    2. Did you manipulate your ensGene ID's at all? Are you supplying two different types of ids in your complete genes list and DE genes list?

    3. Make sure you are running the correct R version 3.0 and bioconductor version 2.12. I was having issues with older versions and this helped.

    Michael
    Last edited by Michael_RNAseq; 05-30-2013, 09:29 AM.

    Comment


    • #3
      Hi Michael!!!

      Thanks for the hints... Actually I have already updated my R version and now everything works beautifully!!!

      So if it can be helpful for anyone else...!

      Thanks guys!
      Manu

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