

Hello,



The following are the command lines that I have been using to filter out
genes with small profile variance from gene expression data by Matlab.



----------------------------------------------------------------------

% filter genes with small profile variance

% less than 25 percentile will be removed from the data

mask = genevarfilter(Data,'Percentile',25);

% Use the mask as an index into the values to remove the filtered data

Data = Data (mask,:);

% GeneSymbols located in the first column of the data

GeneSymbols = GeneSymbols(mask);

----------------------------------------------------------------------

I need to use R package to perform this task. May someone let me know which
functions I could use to do all these tasks?



Thanks,

Jerry

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