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select elements in a list

3 messages · Ivan Calandra, Arnaud Gaboury

Original
Arnaud Gaboury
# 
Dear group,

Here is a list :

l <-
list("100415", "100416", "100419", "100420", "100421", "100422", 
    "100423", "100426", "100427", "100428", "100429", "100430", 
    "100503", "100504", "100505", "100506", "100507", "100510", 
    "100511", "100512", "100513")

I need to access part of it with two variables, x and y. For example, if
x<-100415 et y<-100420, the result I want is 100415,100416,100419,100420.
The object "l" is a list, but can be of any other kind if it can help. 

I tried something like this :
But it doesn't return the needed result

Any help would be appreciated

***************************
Arnaud Gaboury
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Ivan Calandra
# 
Hi,

This should work:
select <- l[which(l==x):which(l==y)]

The problem is that you tried to select the values, but gave x and y as 
indexes. That's why you didn't get the expected result.

See ?which for more info.

HTH,
Ivan

Le 5/21/2010 11:07, arnaud Gaboury a ?crit :

  
    

      
      
    

  


  


      

    

    

      
      

        


  

        

      Arnaud Gaboury
    

    

      
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TY Ivan 

select <- l[which(l==x):which(l==y)] returns the correct result.