[R] writing a function

[Matthew Keller]

Hi Mohamed,

You want to return the matrix - you're returning an element of the
matrix. So in your formula, insert:

return(w)

instead of

return(w[i,j])

On Feb 8, 2008 8:42 AM, mohamed nur anisah <nuranisah_mohamed at yahoo.com> wrote:
> Dear lists,
>
>   I'm in my process of learning of writing a function. I tried to write a simple functions of a matrix and a vector. Here are the codes:
>
>   mm<-function(m,n){              #matrix function
>  w<-matrix(nrow=m, ncol=n)
>  for(i in 1:m){
>   for(j in 1:n){
>    w[i,j]=i+j
>   }
>  }
> return(w[i,j])
> }
>
>   v<-function(n){          #function of a vector
>  y=vector(length=n)
>   for(i in 1:n){
>    y[i]=i
>   }
>  return(y[i])
> }
>
>   when i tried called on my matrix function; say mm(5,10). what i got is the single value of 15..where's is my matrix?? same thing happened to my vector function. Please help me figure out these problems. Thanks a bunch!!
>
>   Cheers,
>   Anisah
>
>
>
>
>
>
>
> ---------------------------------
>
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>
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-- 
Matthew C Keller
Asst. Professor of Psychology
University of Colorado at Boulder
www.matthewckeller.com