【 以下文字转载自 Statistics 讨论区 】 发信人: wz99331 (dotti), 信区: Statistics 标 题: ask for help for R programming 发信站: BBS 未名空间站 (Thu Oct 16 15:25:16 2014, 美东) I need to transpose a file to example.txt the final dataset should be sorted by chr first then by position. Could anyone help me to write the R code? Thank you very much! raw data: snp Chr pos Sample.ID Allele1 Allele2 rs6269442 1 1.614 517 A B rs13475701 1 1.744 517 A B rs13475706 1 1.889 517 A B rs3684358 1 2.06 517 A B rs13475729 1 3.749 517 A B rs3671256 1 5.009 517 A B rs13475750 1 6.153 517 A B rs6404446 1 6.442 517 A B rs31949292 1 8.486 517 A B rs6173215 1 8.692 517 A B rs31917015 1 10.425 517 A B rs6166266 1 10.731 517 A B rs3677683 1 10.932 517 A B rs3695988 1 11.345 517 A B rs4137502 1 11.461 517 A B . . . example.txt snp chr pos sampel.id1 sample.id2 ......... rs6269442 1 1.614 AB AB rs13475701 1 1.744 AA AB rs13475706 1 1.889 AA AB rs3684358 1 2.06 AB BB rs13475729 1 3.749 AB BB rs3671256 1 5.009 AB BB rs13475750 1 6.153 AB AB rs6404446 1 6.442 AB AB rs31949292 1 8.486 AB AB rs6173215 1 8.692 AB AB rs31917015 1 10.425 AB AB rs6166266 1 10.731 AB AB rs3677683 1 10.932 AB AB rs3695988 1 11.345 AB AB rs4137502 1 11.461 AB AB . . .