[R] New unique name

Thomas Lumley tlumley at u.washington.edu
Mon Apr 19 16:22:25 CEST 2004

On Mon, 19 Apr 2004, Erich Neuwirth wrote:

> Since I have not been precise enough, let me explain in more detail.
> I am executing some R code in the COM server.
> For making function calls with parameters existing as ranges in Excel,
> I need to assign values for the arguments of the function call to
> temporary R variables.
> This is the only way of transferring large matrices quickly from Excel
> to R.
> Then, I construct a string which is the function call to be executed.
> The string contains the names of the newly created R variables
> for the function arguments.
> This string then is sent to R and executed as a command.

I used the following for local variables in a macro

        if (!exists(nm,envir=envir))

You wouldn't need the as.name() conversion, since you want a string.

A sufficiently clever person could come up with code that this could
conflict with (eg, if your code relied on the non-existence of
.v..agdefge), but in normal circumstances it should be fine.


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