Dear all,

 seems weird but looks like Rgraphviz redefines the function head() ??
I use fedora 5.

Regards

Marco

#########################################
> head(gene.list)
  chromosome_name start_position end_position entrezgene haplotype  length
1               1          58954        59871      79501         1 1060001
2               1         357522       358460      26683         1 1060001
3               1         357522       358460      81399         1 1060001
4               1         357522       358460     729759         1 1060001
5               1         610959       611897      26683         1 1060001
6               1         610959       611897      81399         1 1060001
> library(Rgraphviz)
Loading required package: graph
Loading required package: geneplotter
Loading required package: annotate
Loading required package: Biobase
Loading required package: tools

Welcome to Bioconductor

  Vignettes contain introductory material. To view, type
  'openVignette()'. To cite Bioconductor, see
  'citation("Biobase")' and for packages 'citation(pkgname)'.


Attaching package: 'annotate'


        The following object(s) are masked from package:biomaRt :

         getGO

Loading required package: lattice
KernSmooth 2.22 installed
Copyright M. P. Wand 1997

Attaching package: 'Rgraphviz'


        The following object(s) are masked from package:annotate :

         toFile

> head(gene.list)
Error in function (classes, fdef, mtable)  :
        unable to find an inherited method for function "head", for
signature "data.frame"
>
> head
standardGeneric for "head" defined from package "Rgraphviz"

function (x, ...)
standardGeneric("head")
<environment: 0x3189f70>
Methods may be defined for arguments: x


sessionInfo()
> sessionInfo()
R version 2.5.0 (2007-04-23)
x86_64-unknown-linux-gnu

locale:
LC_CTYPE=en_US.UTF-8;LC_NUMERIC=C;LC_TIME=en_US.UTF-8;LC_COLLATE=en_US.UTF-8;LC_MONETARY=en_US.UTF-8;LC_MESSAGES=en_US.UTF-8;LC_PAPER=en_US.UTF-8;LC_NAME=C;LC_ADDRESS=C;LC_TELEPHONE=C;LC_MEASUREMENT=en_US.UTF-8;LC_IDENTIFICATION=C

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

other attached packages:
         matlab       Rgraphviz     geneplotter         lattice
annotate
        "0.8-1"        "1.14.0"        "1.14.0"        "0.15-4"        "
1.14.1"
        Biobase           graph humanLLMappings         biomaRt
RCurl
       "1.14.0"        "1.14.2"        "1.16.0"        "1.10.0"         "
0.8-0"
            XML
        "1.9-0"

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