Re: [R] Novice programing question

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Re: [R] Novice programing question

ED] On Behalf Of Ista Zahn Sent: Thursday, 25 October 2007 11:35 AM To: r-help@r-project.org Subject: [R] Novice programing question Hi all, I apologize for the ignorance implicit in this question, but I'm having a hard time figuring out how R functions work. For example, if I wanted to write

Re: [R] Novice programing question

'y' has a default value of NULL, so its value is NULL. Check ?cov to see what happens when it is NULL. On 10/24/07, Ista Zahn <[EMAIL PROTECTED]> wrote: > Hi all, > I apologize for the ignorance implicit in this question, but I'm > having a hard time figuring out how R functions work. For example

[R] Novice programing question

Hi all, I apologize for the ignorance implicit in this question, but I'm having a hard time figuring out how R functions work. For example, if I wanted to write a function to compute a variance, I would do something like >my.var <- function(x) (sum(((x-mean(x)))^2))/(length(((x-mean(x))) ^