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

From: Ravi Varadhan <rvaradhan_at_jhmi.edu>
Date: Sat, 07 May 2011 13:29:25 -0400

x <- 1:5
rev(cumprod(rev(x)))

> rev(cumprod(rev(x)))

[1] 120 120 60 20 5
>

Ravi.



From: r-help-bounces_at_r-project.org [r-help-bounces_at_r-project.org] On Behalf Of pwldk [pwldk_at_hotmail.com] Sent: Saturday, May 07, 2011 12:37 PM
To: r-help_at_r-project.org
Subject: [R] help!! warning:only the first element has been used

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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Received on Sat 07 May 2011 - 17:33:42 GMT

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