Hi Steve, Thanks for replying. Here's a small piece of the data.frame: > bestPartAreadmin[1:5,1:6] DESY_SORT_KEY PRVDR_NUM CLM_THRU_DT CLAIM_NO NCH_NEAR_LINE_REC_IDEN_CD NCH_CLM_TYPE_CD 1 100000193 290003 20090323 20 V 60 2 100000193 290045 20091124 21 V 60 3 100000193 29T003 20090401 22 V 60 4 100000574 050017 20090527 83 V 60 5 100000574 050017 20090921 84 V 60
There's 93 columns total in the data.frame, so these are the first six, where you can see CLAIM_NO. I wish for the resultant data.frame to "look" just like the data.frame above, but values for CLAIM_NO (above) are those that differ/don't match the corresponding CLAIM_NO values in the list (hrc78_clm_no). Does this help? Thanks! -- View this message in context: http://r.789695.n4.nabble.com/Merge-function-Return-NON-matches-tp4590755p4590810.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.