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2004 May 18
2
delete duplicated from data.frame
Hi, ?unique unique returns a vector, data frame or array like x * but with duplicate elements removed * what i'm doing wrong delete duplicated rows with same MEMEBRNO. februar <- dmsegment[unique(dmsegment$MEMBERNO),] This reduce from 197.188 rows to 184.199 but duplicated MEMBERNO didn't left all what a Primary Key setting in mysql me say and with a fix(februar) could recognize . Courious why MEMEBRNO 4,5 ,6 and 11 are left ! dmsegment$MEMBERN...