[BioC] Convert gene expression matrix to ExpressionSet

[Martin Morgan]

On 11/06/2011 07:29 PM, Wendy Qiao wrote:
> Hi all,
>
> I would like to use the GSVA package on my data. In order to do this, the
> gene expression matrix has to be converted into a ExpressionSet. Does
> anybody know a function for this purpose? I found an example from the
> "Convert Data Objects" page (
> http://rss.acs.unt.edu/Rdoc/library/convert/html/coerce.html). The
> following code in the example gives me an error, but I am not sure how to
> define a new class. Could anybody help? Thank you very much.
>
> maT = new("marrayInfo", maLabels=c("S1", "S2"),
>    maInfo= testTarget)
>
> Error in getClass(Class, where = topenv(parent.frame())) :
>    "marrayInfo" is not a defined class

Hi Wendy -- have you looked at the Biobase vignette 'An Introduction to 
Biobase and ExpressionSet' at

http://bioconductor.org/packages/release/bioc/html/Biobase.html

?

Martin

>
> Wendy
>
> 	[[alternative HTML version deleted]]
>
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