[R] get caller's name

[David Winsemius]

On Feb 3, 2011, at 10:27 AM, Ernest Adrogué wrote:

> Hi,
> Suppose a function that checks an object:
>
> stop.if.dims <- function(x) {
>  if (! is.null(dim(x))) {
>    stop("cannot handle dimensional data")
>  }
> }
>

 > mtx <- matrix(c(1,0,0,1), 2)
 > stop.if.dims <- function(x) { objname <- deparse(substitute(x))
+  if (! is.null(dim(x))) {
+    stop(paste(objname,"cannot handle dimensional data") )
+  }
+ }
 > stop.if.dims(mtx)
Error in stop.if.dims(mtx) : mtx cannot handle dimensional data

> This would be used by other functions that can only work with
> dimensionless objects. The problem is the error message would need to
> include the name of the function that called stop.if.dims, so that the
> user knows which function got an argument that was incorrect.
>
> How do I do this? Or maybe there is another way...
>
> -- 
> Ernest
>
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David Winsemius, MD
West Hartford, CT