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2008 Jan 21
2
reordering huge data file
...nclined to think it should be doable with R. How do I open a text-file, line by line, evaluate it and write it back into a textfile in a different position; Phenotypeinfo.txt (contains phenotype information) Before.txt (contains genotypeinformation -see below-) SNP;1-305,000 ID:1-900 allele.A alleleB After.txt (the required format) ID:1-250 phenotype SNP1.allelA SNP1.alleleB SNP2.Allele.A SNP2.allele.B etc I have been looking at ?read.table/scan/readline/SQL-light but have not resolved it. Should I refer to PERL or can this be tackled? I am using a windows machine with R 2.6.0 Any help...