thank you
but plotMA can not realize some functions of MAplot.
that is why i need the converter



On Fri, Sep 6, 2013 at 5:03 PM, James W. MacDonald <jmacdon@uw.edu> wrote:

> library(limma)
> ?plotMA
>
> Best,
>
> Jim
>
>
>
>
> On Friday, September 06, 2013 4:35:01 PM, Wang Peter wrote:
>
>> the MAplot function only accept  AffyBatch object
>> but i have a data in ExpressionSet  variable
>>
>>
>> how to convert ExpressionSet to AffyBatch
>>
>> thank you very much
>>
>>
>>
>>
> --
> James W. MacDonald, M.S.
> Biostatistician
> University of Washington
> Environmental and Occupational Health Sciences
> 4225 Roosevelt Way NE, # 100
> Seattle WA 98105-6099
>



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