Nothing
negData=function(vg="ec",x){
if(vg=="ec"){y=ifelse(x<0,NA,x)}
else if(vg=="esp"){y=ifelse(x<0,NA,x)}
else if(vg=="ph"){
y=ifelse(x<1,NA,ifelse(x<=14,x,NA))
}
return(y)
}
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