[R] vector manipulations

[Duncan Murdoch]

On 3/4/2008 5:41 PM, Bill.Venables at csiro.au wrote:
> Your problem is that your function log1( , ) is not vectorized with
> respect to its arguments.  For a function to work in outer(...) it must
> accept vectors for its first two arguments and it must produce a
> parallel vector of responses.  
> 
> To quote the help information for outer:
> 
> "FUN is called with these two extended vectors as arguments. Therefore,
> it must be a vectorized function (or the name of one), expecting at
> least two arguments."
> 
> Sometimes Vectorize can be used to make a non-vectorized function into a
> vectorized one, but the results are not always entirely satisfactory in
> my experience. 

What problems have you seen?

Duncan Murdoch