My original message was:
>
> I'm trying to draw different icons on a time line using the following
> function:
>
> "place.icon" <- function(icon.name, x.loc, x.end, y.loc, size, color)
> {
> as.function(icon.name(x.loc, x.end, y.loc, size, color))
> }
>
> where icon.name is the name of a function that draws the icon (since some
> icons represent processes over time instead of point events, there are two x
> variables). It draws the function, but aborts with this error message:
>
> Error in as.function(icon.name(x.loc, x.end, y.lo..: Invalid data of mode
> "missing" (too short)
> Dumped
With help from Bill Dunlap (StatSci) and Nick Ellis (CSIRO) I found the
following solution to work:
"place.icon" <- function(icon.name, x.loc, x.end, y.loc, size, color)
{
do.call(as.name(icon.name), list(x.loc, x.end, y.loc, size, color))
}
............................................
Michael D. Maltz
Dept. of Criminal Justice (M/C 141)
University of Illinois at Chicago
1007 West Harrison St.
Chicago, Illinois 60607-7140
Voice & voicemail (312)413-2473
Fax (312)996-8355
Editor, Journal of Quantitative Criminology
Voice & voicemail (312)413-2440
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