On Sun, May 6, 2012 at 6:48 AM, ieee529 contact <ieee529@gmail.com> wrote:

> How can I add a new phenotype (column) to an existing phenoData object
> without creating a new AnnotationDataFrame object and adding that?
>
>
Here is an example:

library(Biobase)
data(sample.ExpressionSet)
head(pData(sample.ExpressionSet))
pData(sample.ExpressionSet)$newColumn = rnorm(ncol(sample.ExpressionSet))
head(pData(sample.ExpressionSet))

Sean

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