I think the error says it
"package ‘gdata’ was built under R version 2.15.1 "
and you have R 2.5.10.

Update your R first, let me know if it doesn't work.

On Mon, Jun 18, 2012 at 5:28 PM, Victoria Xiao <victoriayxiao@gmail.com>wrote:

> Exactly. Every time I try to load it from the package manager, the check
> mark in the check box vanishes and the status goes back to 'not loaded'. At
> the same time, I get this error message:
>
> Error in loadNamespace(i[[1L]], c(lib.loc, .libPaths())) :
> there is no package called ‘gtools’
> In addition: Warning message:
> package ‘gdata’ was built under R version 2.15.1
> Error: package/namespace load failed for ‘gdata’
>  It's very perplexing. Would uninstalling and reinstalling gdata help at
> all?
>
> Thanks again.
>
> On Mon, Jun 18, 2012 at 2:23 PM, Colstat <colstat@gmail.com> wrote:
>
>> Looking at your output, and if you are using package 'gdata'.
>> Then under "Other attached packages" of your output
>>
>> you don't have,
>> >gdata_2.6.2
>>
>> Are you sure you have loaded the package correctly?  It doesn't look like
>> it.
>>
>>
>>
>> On Mon, Jun 18, 2012 at 5:15 PM, Victoria Xiao <victoriayxiao@gmail.com>wrote:
>>
>>>
>>>
>>> On Mon, Jun 18, 2012 at 2:13 PM, Colstat <colstat@gmail.com> wrote:
>>>
>>>> Hi Victor,
>>>> could you type sessionInfo() in R terminal and paste here what you got?
>>>>
>>>> On Mon, Jun 18, 2012 at 5:06 PM, Victoria Xiao <victoriayxiao@gmail.com
>>>> > wrote:
>>>>
>>>>> Hi all,
>>>>>
>>>>> I'm trying to figure out how to import Excel files into R. I'm running
>>>>> Mac
>>>>> 10.6, and so far I've tried the xlsx and gdata packages; both gave
>>>>> error
>>>>> messages.
>>>>>
>>>>> For the xlsx package, here is what I got:
>>>>>
>>>>> > library(xlsx)
>>>>> > project.source = "/Users/vicki/Desktop/R/test/kdReport.xls" #change
>>>>> the
>>>>> path and file name here
>>>>> > PIGF.elisa.dat = read.xlsx (file=project.source, 1, header=T)
>>>>> Error in .jcall("RJavaTools", "Ljava/lang/Object;", "invokeMethod", cl,
>>>>> : java.lang.IllegalArgumentException: Your InputStream was neither an
>>>>> OLE2
>>>>> stream, nor an OOXML stream
>>>>>
>>>>> For the gdata package, it said that gtools was required; when gtools
>>>>> package was attempted to load, this error message resulted:
>>>>>
>>>>> Error in loadNamespace(i[[1L]], c(lib.loc, .libPaths())) :
>>>>> there is no package called ‘gtools’
>>>>> In addition: Warning message:
>>>>> package ‘gdata’ was built under R version 2.15.1
>>>>> Error: package/namespace load failed for ‘gdata’
>>>>>
>>>>> Does anyone know how to resolve either of these error messages, or if
>>>>> there
>>>>> are better packages to interact with Excel files in R on a Mac? Thanks
>>>>> so
>>>>> much.
>>>>>
>>>>> Sincerely,
>>>>> Victoria Xiao
>>>>>
>>>>>        [[alternative HTML version deleted]]
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> R-SIG-Mac mailing list
>>>>> R-SIG-Mac@r-project.org
>>>>> https://stat.ethz.ch/mailman/listinfo/r-sig-mac
>>>>>
>>>>>
>>>>
>>> > sessionInfo()
>>> R version 2.15.0 (2012-03-30)
>>> Platform: i386-apple-darwin9.8.0/i386 (32-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] splines   stats     graphics  grDevices utils     datasets  methods
>>> [8] base
>>>
>>> other attached packages:
>>> [1] epicalc_2.14.1.6 xlsx_0.4.2       xlsxjars_0.4.0   rJava_0.9-3
>>> [5] rj_1.1.0-4       nnet_7.3-1       MASS_7.3-17      survival_2.36-12
>>> [9] foreign_0.8-49
>>>
>>> loaded via a namespace (and not attached):
>>> [1] tools_2.15.0
>>>
>>
>>
>

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