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]]

______________________________________________
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.

Reply via email to