Re: Enhancement Request: output pipe for interogation commands

[nabed <ss...@ol...>]

Thanks Ethan,

The final part of the question is to provide the ability for the user to
graphically add new points onto a given graph by clicking on a location on
the graph. e.g say I have a smooth function and want to add a bump to it in
a region, I could replace three existing points by adding three new points
(via mouse interaction on the graph window) and then form a new smooth
interpolated graph containing the new points. I would then want to get the
new dataset back from gnuplot.


Serle



Ethan Merritt wrote:
> 
> On Wednesday 25 March 2009 05:31:14 nabed wrote:
>> 
>> Hi
>> 
>> Would it be possible to add the ability recieve output from gnuplot, over
>> stdout to enable command driven bi-directional communication with
>> gnuplot.
>> That way a program could start an embedded gnuplot process and monitor
>> the
>> processes input and outpout streams to do bi-directional communication. 
>> 
>> Specifically I would want to be able to use this text output pipe
>> mechanism
>> to:
>> 
>> 1)  get the region displayed by the graph, after the user has finished
>> interactively zooming and panning. (get_xxx)
> 
> If you want output to stdout:
>  print GPVAL_XMIN, GPVAL_XMAX, GPVAL_YMIN, GPVAL_YMAX
> 
> If you want output via a new or different pipe:
>  set print "| namedpipe"
>  print GPVAL_XMIN, GPVAL_XMAX, GPVAL_YMIN, GPVAL_YMAX
> 
>> 2) to be able to set when the user can interact with gnuplot or not i.e.
>> toggle interaction mode.
> 
> I don't understand what you mean by this.
> 
>> 3) to be able to be able to put gnuplot in a mode which allows the user
>> to
>> toggle the addition and removal of new data points and to output
>> point_added
>> and point_removed notifications.
> 
> See the demo script:   "mousevariables.dem"
> 
> 
> All of this is possible already; much of since version 4.2 or earlier.
> If you could narrow your question down to a specific thing that you want
> to do, perhaps someone will suggest a bit of sample code to look at.
> 
>> Thanks,
>> Serle
> 
> -- 
> Ethan A Merritt
> 
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