[R] If loops

[Uwe Ligges]

Laura Collins wrote:

> Hi,
> 
>  
> 
> I'm a complete beginner to all this so I was hoping someone could help
> me!
> 
>  
> 
> What I'm trying to do is to write a function that returns the
> coordinates where a vector x is equal to a.  So say I invent a vector x:
> 
> 
> x<-c(,5,8,9,8,3).
> 
> If a is a<-8.
> 
>  
> 
> I want the function to return the coordinates of x where the number 8
> appears (i.e. 2 4).
> 
> I know I need to set up an if loop but I'm really not sure how to do
> this.
> 
>  
> 
> Any advice or clues will be much appreciated.




which(a==x)

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Uwe Ligges


>  
> 
> Thanks,
> 
>  
> 
> Laura
> 
> 
> 	[[alternative HTML version deleted]]
> 
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