search for: physicalposit

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2007 Nov 14
3
How to get row numbers of a subset of rows
Hello list, I read in a txt file using <B<-read.table(file="data.snp",header=TRUE,row.names=NULL) by specifying the row.names=NULL so that the rows are numbered. Below is an example after how the table looks like using <B[1:10,1:3] SNP Chromosome PhysicalPosition 1 SNP_A-1909444 1 7924293 2 SNP_A-2237149 1 8173763 3 SNP_A-4303947 1 8191853 4 SNP_A-2236359 1 8323433 5 SNP_A-2205441 1 8393263 6 SNP_A-1909445 1 7924293 7 SNP_A-2237146 2...