[R] Fill in NA values in vector with previous character/factor

[Yasir Kaheil]

maybe this is easiest way to do it:


x<-c("A","B",NA,NA,"C",NA,NA,NA,NA,"D",NA,NA);

x[is.na(x)]<- "D"; x


thanks
y




Owen Jones-3 wrote:
> 
> I have a vector of data (species names) interspersed with NA values  
> and I want a function to "fill in the blanks", replacing NA values  
> with whatever the last species name was.
> 
> For example the vector:
> 
>   "A","B",NA,NA,"C",NA,NA,NA,NA,"D",NA,NA.
> 
> should evaluate to:
> 
> "A" "B" "B" "B" "C" "C" "C" "C" "C" "D" "D" "D"
> 
> 
> I tried to use rle() in a function to do this but have hit a brick wall.
> 
> How would YOU do this?
> 
> Many thanks,
> 
> Owen
> 
> ______________________________________________
> R-help at 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.
> 
> 


-----
Yasir H. Kaheil
Columbia University
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