[Bioc-devel] Changes to pData <-

[Martin Morgan]

Thanks Richard, that should be fixed in the release branch as 1.16.1,
probably not appearing until Wednesday via biocLite. Available in
devel and release svn now.

Martin

Richard Pearson <richard.pearson at postgrad.manchester.ac.uk> writes:

> Hi
>
> I've noticed a change in pData <- since sometime recently before the 
> upgrade to R2.6.0. It seems like its no longer possible to change the 
> pData of an Affybatch or ExpressionSet object without first modifying 
> the varLabels. The following example:
>
> library(affy)
> data(affybatch.example)
> pData(affybatch.example) <- data.frame("AorB" = c("A", "B", "A"))
>
> gives this error:
>
> Error in `row.names<-.data.frame`(`*tmp*`, value = "AorB") : invalid 
> 'row.names' length
>
> The modified code works fine:
>
> library(affy)
> data(affybatch.example)
> varLabels(affybatch.example) <- "AorB"
> pData(affybatch.example) <- data.frame("AorB" = c("A", "B", "A"))
>
> It seems a bit unnecessary to have to do both the varLabels and pData 
> steps, was this behaviour intended?
>
> Many thanks
>
> Richard
>
>
> Richard Pearson
> School of Computer Science
> University of Manchester
>
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-- 
Martin Morgan
Computational Biology Shared Resource Director
Fred Hutchinson Cancer Research Center
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