Prof Brian D Ripley
ripley at stats.ox.ac.uk
Fri Apr 30 10:28:17 CEST 1999
On Fri, 30 Apr 1999, Geldenhuys, Willie wrote:
> I am trying to use the Windows version of R to do the following:
> - Have a Delphi front-end which gets the user input
> - Delphi will produce a R script, do a system call to R to
> calculate the statistics.
> Is there a better way? Maybe a library one can use in Delphi or
> Visual C?
Not yet! If you look back in the recent R-help archives you will see
a report on future plans for R for Windows.
> - How do one see a graph? A graph is plotted in a window which
> IMMEDIATELY closes afterwords so that one can't see
> anything. How can one get the graph to show until user
> presses a key.
You did something to make the window close, for example had EOF in the
script. If my guess is right, don't do that. Two ideas:
(1) call locator(1) at the point you want a wait. Then the user has to
click on the graph to continue.
(2) run R at the end of a pipe. Then you can send EOF when you are done
with R, or dev.off() when you are done with the graphics window. I have
no idea if Delphi supports pipes correctly. The --ess flag in R is
designed to simplify its use at the end of a pipe from NTemacs.
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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