Hello,
I have two rows which are almost identical but miss different values at different locations. I would like to merge these two rows so that the missing values are replaced by the element in the same column on the other row making one row. If both rows contain a NA, NA remains in the output. 1 2 3 4 5 Row1 AA AG GG NA NA Row2 NA AG GG AA NA The output i want is one row 1 2 3 4 5 Row AA AG GG AA NA I tried to use the functions match,grep, and gsub but I can't seem to make it work I would appreciate any suggestions! Best regards, Iris Kolder [[alternative HTML version deleted]] ______________________________________________ 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.