[R] function not found

[Thomas Lumley]

On Tue, 10 Apr 2001, Yu-Ling Wu wrote:

> Hi,
>
> I have a R script with a funcion in it. When I run
> this
> script under R enviornment, it works fine. But if I go
> to DOS command prompt and type "rterm --slave < foo.r"
> it says:
>          Error: couldn't find function "myFun"
>          Execution halted
>
> Below is part of my code. Does anyone know why?
>
> Thanks,
> Yu-Ling Wu
>
> ================================================
> If (flag == 0) { do something... }
> else { myFun() }
>
> myFun <- function() {....statements.....}
> ================================================

It looks as if you haven't defined myFun() until after you tried to use
it. R is not psychic, unfortunately.

Forward references like this are fine in sets of functions, since all the
functions are read before you use them, but when you have some top-level
code it can only call functions defined earlier in the file.

	-thomas

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