Analysing microarray data in BioConductor-The Knowledgeblog
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IOM ▴ 20
@iom-7548
Last seen 5.6 years ago
Birmingham

Dear all,

Thanks for reading.  I have tried to follow this tutorial http://bioinformatics.knowledgeblog.org/2011/06/20/analysing-microarray-data-in-bioconductor/

however, when I arrive to the point of annotating the results with associated gene symbols I get this error

> gene.symbols <- getSYMBOL(probeset.list$ID, "hgu133plus2")
Error in unlist(lookUp(x, data, "SYMBOL")) : 
  error in evaluating the argument 'x' in selecting a method for function 'unlist': Error in lookUp(x, data, "SYMBOL") : No keys provided

The same error has happened to me with other examples (different arrays), so I do not know how to sort it out. Anybody has any idea? Thanks very much,

Regards

IOM

hgu133plus2 getSymbol error in unlist microarray • 1.1k views
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@steve-lianoglou-2771
Last seen 4 weeks ago
United States

The new and improved ways of doing these types of lookup/cross-refs is to use select.

This question pops up quite a bit, so if you search for something like "convert probeset symbol" on this site, you should find a few answers already, such as:

Take a look at some of the "Similar Posts" listed on the right of this page for this question, ie:

 

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Entering edit mode
IOM ▴ 20
@iom-7548
Last seen 5.6 years ago
Birmingham

Thanks Steve,

I will do what you say. Cheers

IOM

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