Dear friends, I am trying to read CELfiles using ReadAffy() command. I stored all my CEL files in a directory and use the following commands: >library(affy) >mydata<-ReadAffy() Error in read.affybatch(filenames = l$filenames, phenoData = l$phenoData, : Is C:/Documents and Settings/Desktop/kumar/data03-15/Kumar 001.CEL really a CEL file? tried reading as text, gzipped text and binary I do not understand why this happened. Could anybody help me out? Thank you very much. Sharrie ********************************************************** Electronic Mail is not secure, may not be read every day, and should not be used for urgent or sensitive issues.

Xiaoyu Jia wrote: > Dear friends, > > I am trying to read CELfiles using ReadAffy() command. I stored all my > CEL files in a directory and use the following commands: > > >>library(affy) >>mydata<-ReadAffy() > > Error in read.affybatch(filenames = l$filenames, phenoData = > l$phenoData, : > Is C:/Documents and Settings/Desktop/kumar/data03-15/Kumar > 001.CEL really a CEL file? tried reading as text, gzipped text and > binary Odd. I don't have any problems reading in these files. > dat <- ReadAffy() > sampleNames(dat) [1] "Kumar 001.CEL" "Kumar 002.CEL" "Kumar 003.CEL" "Kumar 004.CEL" "Kumar 005.CEL" "Kumar 006.CEL" [7] "Kumar 007.CEL" "Kumar 008.CEL" It may be that they are corrupted. Are they all ~2786 Kb in size? Jim > > > I do not understand why this happened. Could anybody help me out? > > Thank you very much. > > Sharrie > > > ********************************************************** > Electronic Mail is not secure, may not be read every day, and should not be used for urgent or sensitive issues. > > _______________________________________________ > Bioconductor mailing list > Bioconductor@stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/bioconductor -- James W. MacDonald Affymetrix and cDNA Microarray Core University of Michigan Cancer Center 1500 E. Medical Center Drive 7410 CCGC Ann Arbor MI 48109 734-647-5623

Dear friends, I am trying to read CELfiles using ReadAffy() command. I stored all my CEL files in a directory and use the following commands: >library(affy) >mydata<-ReadAffy() Error in read.affybatch(filenames = l$filenames, phenoData = l$phenoData, : Is C:/Documents and Settings/Desktop/kumar/data03-15/Kumar 001.CEL really a CEL file? tried reading as text, gzipped text and binary I do not understand why this happened. Could anybody help me out? Thank you very much. Sharrie ********************************************************** Electronic Mail is not secure, may not be read every day, and should not be used for urgent or sensitive issues.