[R] missing value where TRUE/FALSE needed

[cruz]

is this what you want?

> vector1
 [1]  65   1  34 100  42  20  79  43  89  10
> vector2
 [1] 34 65 47 91 48 32 23 74 92 86
>
>     for (i in 1:10) {
+       for (j in 1:10) {
+         if (vector1[i] == vector2[j])
+         show(c(i,j))
+         }
+      }
[1] 1 2
[1] 3 1



On Sat, Nov 8, 2008 at 8:22 AM, David Croll <david.croll at gmx.ch> wrote:
> Hello dear R people,
>
>
> for my MSc thesis I need to program some functions, and some of them simply
> do not work. In the following example, I made sure both vectors have the
> same length (10), but R gives me the following error:
>
> Error in if (vector1[i] == vector2[j]) { :
>  missing value where TRUE/FALSE needed
>
> I googled for possible solutions, but I did not find a good explanation for
> this...
>
>
> The code:
>
> test <- function() {
>     vector1 <- sample(1:100,10)
>   vector2 <- sample(1:100,10)
>     for (i in vector1) {
>             for (j in vector2) {
>                     if (vector1[i] == vector2[j]) {
>                             show(list(i,j))
>                             }
>                         }
>             }
>     }
>
> Regards, David
>
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