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Editorial Team
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Asked: 2026-06-12T13:29:58+00:00

I have a data frame like this: COL1 COL2 COL3 a h b f

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I have a data frame like this: 

COL1  COL2  COL3 

   a           h
   b     f    
   c     g       
   d           j

I would like the following output:

 COL  
   a    
   b    
   c    
   d   
   f   
   g   
   h   
   j

How this can be done?
Thanks in advance!

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1 Answer

  1. Editorial Team

    If your data.frame is named dat, try:

    unlist(dat, use.names=FALSE)

    You may also want to try the following:

    as.character(unlist(dat, use.names=FALSE))
c(na.omit(as.character(unlist(dat, use.names=FALSE))))

    which might be useful if your data are entered as factors.

    Also, in your question, you make it appear that you don’t actually have a basic “vector”, but rather a one-column data.frame. Thus, something like dat2 <- data.frame(COL = c(na.omit(as.character(unlist(dat, use.names=FALSE))))) might be what you’re looking for.

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