Nothing
moveNALeft<-function(vettore){
spia<-NA
for(j in 1:(length(vettore)-1)){
for(i in 1:(length(vettore)-1))
if(is.na(vettore[i])){
spia<-vettore[i+1]
vettore[i+1]<-NA
vettore[i]<-spia
}
}
vettore
}
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