# [R] Error in conditional execution "missing value where TRUE/FALSE needed"

R. Michael Weylandt michael.weylandt at gmail.com
Sat Mar 17 14:38:17 CET 2012

```My guess is that you're not getting what you expect from operator
precedence: note that

1:3 - 1
1:(3-1) #Not equal

If that doesn't fix it, you can use options(error = recover) to find
the values of your logical conditions at the exact moment an error is
thrown and see which one is NA but my money is on the above.

Michael

On Sat, Mar 17, 2012 at 5:34 AM, Dong-Joon Lim <tgno3.com at gmail.com> wrote:
> Hello R friends,
>
> I've got error message as follows;
>
>>
>> n<-0
>> roc<-array(0,c(ti-1,1))
>> avgroc<-0
>>
>> for(i in 1:ti-1){
> +  if(orientation=="in"){
> +   if(eff_p1[i,1,i]==1 && eff_p1[i,1,ti-1]<1 && ed[i,1]>d[i,1]){
> +      roc[i,1]<-(1/eff_p1[i,1,ti-1])^(1/(ed[i,1]-d[i,1]))
> +      n<-n+1
> +   }
> +  }
> +  if(orientation=="out"){
> +   if(eff_p1[i,1,i]==1 && eff_p1[i,1,ti-1]>1 && ed[i,1]>d[i,1]){
> +    roc[i,1]<-(eff_p1[i,1,ti-1])^(1/(ed[i,1]-d[i,1]))
> +    n<-n+1
> +   }
> +  }
> + }
> Error in if (eff_p1[i, 1, i] == 1 && eff_p1[i, 1, ti - 1] < 1 && ed[i,  :
>  missing value where TRUE/FALSE needed
>
> I checked "eff_p1[i,1,i]==1 && eff_p1[i,1,ti-1]<1 && ed[i,1]>d[i,1]" for
> all i and it returned either TRUE or FALSE normally.
> Why it shows error message when I link it with repetitive execution (for i
> in 1:ti-1)?
> All variables have been defined correctly including ti, orientation,
> eff_p1, and ed.
>
> DJ
>
>        [[alternative HTML version deleted]]
>
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