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

Wendy

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