[R] help!! warning:only the first element has been used

[Dennis Murphy]

Hi:

Try

sapply(1:length(x), function(y) prod(x[y:length(x)]))

HTH,
Dennis

On Sat, May 7, 2011 at 9:37 AM, pwldk <pwldk at hotmail.com> wrote:
> i simply want a set of numbers in a vector which:
> in the vector v, i want the numbers be (x[1]*x[2]*....*x[100],
> x[2]*x[3]*...*x[100], x[3]*x[4]*...*x[100],...,x[98]*x[99]*x[100],
> x[99]*x[100],x[100])
> so there should be 100 elements in the vector.
> here's how i do it
> x=rnorm(100,0.5,0.2)
> v=prod(x[(1:100):100])
> but it turns out failed as it says there are 100 elements in the expression,
> but only the first one has been used
>
> anyone help me how do i get the number i want?
> thanks soooo much!!
>
>
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