[R Thanks for help Writing a function

Thank you very much

It works perfectly well

Have a wonderful day




|---------+---------------------------->
|         |           ripley at stats.ox.a|
|         |           c.uk             |
|         |                            |
|         |           04/28/03 12:58 PM|
|         |                            |
|---------+---------------------------->
  >------------------------------------------------------------------------------------------------------------------------------|
  |                                                                                                                              |
  |       To:       Vincent STOLIAROFF/fr/socgen at socgen                                                                          |
  |       cc:       r-help at stat.math.ethz.ch                                                                                     |
  |       Subject:  Re: [R] Writing a function                                                                                   |
  >------------------------------------------------------------------------------------------------------------------------------|

I have written the following  function

ClearDeltaBis

function(Matrix){
for (i in 1:3)
                        {
                        for (j in 1:2)
                                {if (is.na(Matrix[i,j]))
NA->(Matrix[i,j+1])}
                        }
Matrix
}

it looks correct but when I try to implement it on the MatCor Matrix I get
this error message

ClearDeltaBis(MatCor)

Error: couldn't find function "(<-"

I don't understand where does it come from since I have no string like (<-
in my code

You do, in the line

NA->(Matrix[i,j+1])

That's an unusual way of writing

(Matrix[i,j+1]) <- NA

and you have a set of parentheses there on the LHS of the assignment.
R is looking for a function "(<-" to implement this as

Matrix[i,j+1] <- "(<-"(NA)

You don't need (or want) the parentheses.

You might want to look up how functions on the LHS of assignments are
supposed to work in R.

--
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595







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