On 2/16/2006 3:22 PM, Michael wrote:
> I am actually using Rgui on Windows...
>
> What can I do?
>
> There is no way to programmatically clear screen?
Of course there's a way, or Rgui couldn't do it. The menu item calls
the function "menuclear", which is exported from R.dll, currently with
definition
void menuclear(control m)
{
consoleclear(RConsole);
}
You don't have access to a valid value for m, but since it's not used,
that shouldn't matter. Write a C function to import this function from
R.dll and call it.
You shouldn't count on your function working in any newer release;
menuclear is not part of the published API. And you shouldn't expect
your code to work if you're running in Rterm or on any platform other
than Windows. But if you're desperate to call it, you can.
Brian Ripley has made many of the menu operations in Rgui available
through R functions. Perhaps they all should be; would you like to
write the code to do it? If so, please write up the R interface before
you go ahead and do all the work. I expect there will be some
disagreement there, and it might affect the implementation.
Duncan Murdoch
>
> On 2/16/06, Henrik Bengtsson <[EMAIL PROTECTED]> wrote:
>>
>> Hi,
>>
>> depends on what type of terminal you are running. For example, if you
>> run R in a VT100 terminal, you can try
>>
>> cat("The following VT100 escape sequence will clear the screen on a
>> VT100 terminal\n")
>> cat("\033[2J") # <ESC>[2J == Clear Screen
>> cat("If the screen was cleared you should only see this sentence.\n")
>>
>> i.e.
>>
>> vt100ClearScreen <- function(...) cat("\033[2J")
>>
>> Some links:
>> http://www.fh-jena.de/~gmueller/Kurs_halle/esc_vt100.html
>> http://en.wikipedia.org/wiki/VT100
>>
>> Note, this is not guaranteed to work everywhere. To the best of my
>> knowledge, you will not be able to do anything like this in Rgui on
>> Windows.
>>
>> Cheers
>>
>> Henrik
>>
>>
>> On 2/16/06, Michael <[EMAIL PROTECTED]> wrote:
>> > Any funcation that is callable from my program, instead of pressing
>> keys?
>> >
>> > Thanks a lot!
>> >
>> >
>> > On 2/16/06, Christian Schulz <[EMAIL PROTECTED]> wrote:
>> > >
>> > > ctrl - e & l
>> > >
>> > > >HI all,
>> > > >
>> > > >How to clear the screen in R-console?
>> > > >
>> > > >Thanks a [EMAIL PROTECTED]
>> > > >
>> > > > [[alternative HTML version deleted]]
>> > > >
>> > > >______________________________________________
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>> > > >
>> > > >
>> > > >
>> > >
>> > >
>> > >
>> >
>> > [[alternative HTML version deleted]]
>> >
>> > ______________________________________________
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>> > PLEASE do read the posting guide!
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>> >
>> >
>>
>>
>> --
>> Henrik Bengtsson
>> Mobile: +46 708 909208 (+1h UTC)
>>
>
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>
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