Hi , I am using Bioconductor/R and inSilicoMerging package. I got an error message:

INSILICOMERGING: Run with no additional merging technique... **Error in (function (classes, fdef, mtable): **unable to find an inherited method for function 'annotation' for signature '"character"*

Please tell me what does this message means?

Tnx

My steps:

(1) download

• E-GEOD-52763 (E-GEOD-52763.raw.1.zip) and
• E_GEOD-45006 (E-GEOD-45006.raw.1.zip)

(2) code

library(affy)
library(annaffy)

ReadCell = ReadAffy()
Norm.data = rma(ReadCell)

(3) code:

eset1<-Norm.data
eset2<-Norm.data

(4) code:

library(inSilicoMerging)

esets= list(eset1,eset2)
eset_FRMA = merge(esets)

INSILICOMERGING: Run with no additional merging technique...
Error in (function (classes, fdef, mtable)  :
  unable to find an inherited method for function 'annotation' for signature '"character"'

same error message:

eset_BMC = merge(esets, method="BMC")