OK...x[min(which(x!=0)):length(x)] does the trick!

I guess the coffee is slowly but surely working! . 

Manoj
  ----- Original Message ----- 
  From: ManojW 
  To: R-help 
  Sent: Monday, May 30, 2005 2:12 PM
  Subject: Re: Vector Manipulation


  I should clarify that I tried x[cumsum(x)!=0] but the problem is that I might have negative numbers in the vector that can potentially make cumsum(x) equal to zero somewhere down the line in the vector.

  Manoj
    ----- Original Message ----- 
    From: ManojW 
    To: R-help 
    Sent: Monday, May 30, 2005 2:00 PM
    Subject: Vector Manipulation


    Dear All,
        For any given vector, I want to extract a sub-vector such that the new vector skips all zeros, if any , at the start of vector. Is it possible to achieve this w/o looping?

        E.G :     >    x    = c(0,0,1,2,3,4,5,0,0,8,9)
                     >    y    = somefunc(x);
                    > y 
                    [1]    1 2 3 4 5 0 0 8 9

        In the example above, I want to skip the two leading zeroes till I hit the non-zero (1 in the above case). I also want to retain all zero after the first non-zero digit (again 1 in this case).

        Hope I am not confusing you guys. Thanks in advance for your help.

    Regards

    Manoj

            

        
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