Dear
R-users,



I've been trying to write a script but i encounter much problems with basic
functions.. That is, i try to write a simple IF ELSE statement, with 2
requirements for the IF :



if (abs(x + Dataset$LAT[1]) <= 3) and (abs(y + Dataset$LONG[1]) <= 3) {z
<- 1} else {z <-0}



This does not work. So far i succeeded with one of tthe conditions :



if (abs(x + Dataset$LAT[1]) <= 3) {z <- 1} else {z <-0}  
> this work, so i tried to had the second condition with "and" or
"&" or even "& &&" as writen in operators
r-help but none of my trials works, it retrun "unexpected symbol
"{" ...



any tip ?





with regards





      
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