R help - Mar 2005 - function in order to plot the same graph to postscript an d pdf

This works for me:

plot.both <- function(expr, filename) {
     pdf(file=paste(filename, ".pdf", sep=""))
     eval(expr)
     dev.off()
     postscript(file=paste(filename, ".eps", sep=""))
     eval(expr)
    dev.off()
}

plot.both(expression(plot(1:10)), "testboth")


Andy

PS:  Please make sure you post correct code.  The code you posted has syntax
(and other) errors.
> From: Ronny Klein
> 
> > > The myplot is something like this:
> > >
> > > plot(x)
> > > text(foo)
> >
> > Aha, I was surprised that this worked for one of the two plots.
> > You could pass myplot as an expression, e.g. myplot > >
expression(plot(x)), and then eval() that in the body of
> plot.both().
> 
> I've followed your advice and changed my function to 
> something like this:
> 
> plot.both <- function{myplot, filename}{
>      MYPLOT <- expression(myplot)
>      pdf(file=paste(filename, ".pdf", sep=""))
>      eval(myplot)
>      dev.off()
>      postscript(file=paste(filename, ".eps", sep=""))
>      eval(myplot)
>     dev.off()
>  }
> 
> However the result is the same: the first one is actually 
> printed but the 
> second plot is empty. 
> 
> Ronny
> 
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