[R] Loop does not work: Error in else statement

[Berend Hasselman]

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Your code is completely messed up and unreadable.

Berend

On 29-09-2014, at 21:17, Frank S. <f_j_rod at hotmail.com> wrote:

> Hi to all members of R list,
> 
> 
> 
> I�m working with data.table package, and with 6
> variables: "ID" (Identifier), "born" (Birthdate), "start" (Starting date), "register" (date of measurement), "value"and "end" (date of expiration). So, the natural order of dates would be: born
> =< start =< register =< end.  As an example, I have: DT <- data.table(ID = as.factor(rep(1:4,each=2)), 
> 
>     born =
> as.Date(rep(c("1955-02-20", "1990-07-25",
> "1972-03-18", "1988-05-03"),each=2)),
> 
>     start =
> as.Date(rep(c("1953-03-28", "1990-07-01",
> "1983-09-05", "1988-07-18"),each=2)),
> 
>     register =
> as.Date(c("1955-08-11", "1958-03-28",
> "1990-07-09", "1992-07-01", 
> 
>                "1983-09-05",
> "2002-09-28", "1992-07-10", "1993-03-12")),
> 
>     value =
> c(205, 346, 34, 76, 320, 148, 209, 274),
> 
>     end =
> as.Date(rep(c("1960-11-05", "1997-10-15",
> "2002-09-27", "1997-03-02"),each=2)))
> 
> 
> 
> I would want to make 3 operations:1. First: Remove
> entire ID�s where "start" is previous to "born" date (excepting those subjects whose
> month and year values are the same in "start" and "born" variables: I assign "born"
> date to "start" date in these cases).Afterwords:2. Remove only
> specific rows (not all ID) where �register� is previous to �start�.3.Remove only
> specific rows (not all ID) where �end� is previous to �register�.
> 
> I have: DT[ , {    if (all(born > start))       {     indx <- which(paste(year(born)) == paste(year(start)) &  paste(month(born)) == paste(month(start)))      result <- list(born=born[indx], start=born[indx], register=register[indx], value=value[indx], end=end[indx])      }        if (all(register > start) | all(end > register))         {         indx <- which((register > start) | (end > register))         result <- list(born=born[indx], start=start[indx], register=register[indx], value=value[indx], end=end[indx])          }      else         {         NULL         }   else     {     indx <- which(all(register > start) | all(end > register))     result <- list(born=born[indx], start=start[indx], register=register[indx], value=value[indx], end=end[indx])      }   result   }, by=ID] BUT I GET AN ERROR MESSAGE: Error: syntax error, unexpected ELSE in "else"  Please, can anyone help me? Thank you!!  
> 
> 		 	   		  
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> 
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