limma and files with separate channels
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Guoneng Zhong ▴ 180
@guoneng-zhong-996
Last seen 9.7 years ago
Hi, Each of my plates don't result in one file with the cy3 and cy5 channels in it, but rather, each produces two files, one for each channel. How could I construct the target file for something very basic like a reference design without having to merge the pair of files first. Thanks, G
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@gordon-smyth
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WEHI, Melbourne, Australia
>Date: Thu, 28 Apr 2005 16:34:36 -0400 >From: Guoneng Zhong <guoneng.zhong@yale.edu> >Subject: [BioC] limma and files with separate channels >To: bioconductor@stat.math.ethz.ch > >Hi, > >Each of my plates don't result in one file with the cy3 and cy5 channels >in it, but rather, each produces two files, one for each channel. How >could I construct the target file for something very basic like a >reference design without having to merge the pair of files first. Is it possible that you are using ImaGene, which does write separate files for Cy3 and Cy5? See page 8 of the Limma User's Guide (http://bioinf.wehi.edu.au/limma/usersguide.pdf) for an example of a targets file in this situation. ImaGene is the only image analysis program that we know of that writes separate files for Cy3 and Cy5, and therefore is the only separate- file format that is supported by the limma package. Gordon >Thanks, >G
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No, I don't think it is ImaGene. We have high density Nimblegen arrays we get from NASA, and NASA, for traditional reasons, reads the two channels separately into two respective files. So is there any way to read them without actually modifying the image results files? Thanks, G -- Systems Programmer Yale Center for Medical Informatics fax: 203-737-5708 Quoting Gordon Smyth <smyth@wehi.edu.au>: > > >Date: Thu, 28 Apr 2005 16:34:36 -0400 > >From: Guoneng Zhong <guoneng.zhong@yale.edu> > >Subject: [BioC] limma and files with separate channels > >To: bioconductor@stat.math.ethz.ch > > > >Hi, > > > >Each of my plates don't result in one file with the cy3 and cy5 channels > >in it, but rather, each produces two files, one for each channel. How > >could I construct the target file for something very basic like a > >reference design without having to merge the pair of files first. > > Is it possible that you are using ImaGene, which does write separate files > for Cy3 and Cy5? See page 8 of the Limma User's Guide > (http://bioinf.wehi.edu.au/limma/usersguide.pdf) for an example of a > targets file in this situation. > > ImaGene is the only image analysis program that we know of that writes > separate files for Cy3 and Cy5, and therefore is the only separate- file > format that is supported by the limma package. > > Gordon > > >Thanks, > >G > >
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You may have to write your own parser. Alternatively, you can add an option to the read.maImages function to read the array files. I find the latter technique pretty useful, as then you can learn from Gordon's code. Sean On Apr 29, 2005, at 9:47 AM, Guoneng Zhong wrote: > No, I don't think it is ImaGene. We have high density Nimblegen > arrays we get > from NASA, and NASA, for traditional reasons, reads the two channels > separately > into two respective files. So is there any way to read them without > actually > modifying the image results files? > > Thanks, > G > > > -- > > Systems Programmer > Yale Center for Medical Informatics > fax: 203-737-5708 > > > > Quoting Gordon Smyth <smyth@wehi.edu.au>: > >> >>> Date: Thu, 28 Apr 2005 16:34:36 -0400 >>> From: Guoneng Zhong <guoneng.zhong@yale.edu> >>> Subject: [BioC] limma and files with separate channels >>> To: bioconductor@stat.math.ethz.ch >>> >>> Hi, >>> >>> Each of my plates don't result in one file with the cy3 and cy5 >>> channels >>> in it, but rather, each produces two files, one for each channel. >>> How >>> could I construct the target file for something very basic like a >>> reference design without having to merge the pair of files first. >> >> Is it possible that you are using ImaGene, which does write separate >> files >> for Cy3 and Cy5? See page 8 of the Limma User's Guide >> (http://bioinf.wehi.edu.au/limma/usersguide.pdf) for an example of a >> targets file in this situation. >> >> ImaGene is the only image analysis program that we know of that writes >> separate files for Cy3 and Cy5, and therefore is the only >> separate-file >> format that is supported by the limma package. >> >> Gordon >> >>> Thanks, >>> G >> >> > > _______________________________________________ > Bioconductor mailing list > Bioconductor@stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/bioconductor
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