On Jul 30, 2011, at 2:25 AM, Jeffrey Joh wrote:
I would like to reorder a two-column table by column A, then fill column B with the values above it. For example: Original:A B2 545 NA8 784 NULL3 269 NULL First sort by column A:A B2 543 264 NULL5 NA8 789 NULL Then replace null/na values in column B with the value above it:A B2 543 264 265 268 789 78 What is the best way to do this?Jeff[[alternative HTML version deleted]]
The "best way to do this" meaning to get help on _this_ mailing list, is to post in plain text and to post the results of dput() on this "two-column table".
All this is explained here:
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
-- David Winsemius, MD West Hartford, CT ______________________________________________ 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.
