[R] shell and shell.exec on Windows

Gabor Grothendieck ggrothendieck at gmail.com
Sat Aug 11 14:24:18 CEST 2007

The system() function has an invisible= argument.  The ryacas package
uses system() to run yacas.  See the runYacas() and
yacasInvokeString() functions in yacas.R for examples:

On 8/11/07, Erich Neuwirth <erich.neuwirth at univie.ac.at> wrote:
> I have an Excel workbook "MyWorkbook.xls" containing an Auto_Open macro
> which I want to be run from R.
> shell.exec("MyWorkbook.xls")
> does that.
> shell("start MyWorkbook.xls")
> also runs it.
> In both cases, the Excel window is visible on screen when Excel is started.
> Is there a way of opening the sheet with a hidden Excel window?
> start has some parameters (e.g. /MIN), which should allow this, but
> shell("start /MIN MyWorkbook.xls")
> also starts Excel visibly.
> --
> Erich Neuwirth, University of Vienna
> Faculty of Computer Science
> Computer Supported Didactics Working Group
> Visit our SunSITE at http://sunsite.univie.ac.at
> Phone: +43-1-4277-39464 Fax: +43-1-4277-39459
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