Re: [Plplot-general] strip charts

[Alan W. I. <ir...@be...>]

You are probably already aware of this, but just to make sure let me state
we already do have some strip-chart API.  See the documentation for
plstripc, plstripd, and plstripa in
http://plplot.sourceforge.net/resources/docbook-manual/plplotdoc-html-0.4.3/.
To see how this all fits together, have a look at the simple example in
x17c.c.

For non-interactive plots we definitely allow more than one plot per page.
However, I have never tried the idea of multiple strip charts so I don't
know whether that would work or not.  Can somebody else here comment?

Alan

email: ir...@be...
phone: 250-727-2902	FAX: 250-721-7715
snail-mail:
Dr. Alan W. Irwin
Department of Physics and Astronomy,
University of Victoria, P.O. Box 3055,
Victoria, British Columbia, Canada, V8W 3P6
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Linux-powered astrophysics
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On Mon, 2 Sep 2002, Steven Jenkins wrote:

> I have an old DOS-based data acquisition application that I've almost
> completely ported over to Linux (on its way to being open-sourced). The
> only two things left to port are the low level data acquisition (which
> looks like it can be handled easily by the Comedi library) and graphics.
>
> The application allows the user to create (via scripting) simple x-y
> plots and strip charts, intermixed with text boxes. An example can be
> seen at http://home1.gte.net/res000mx/tidal.gif. The strip charts in
> this case are all the same size, but the user has control of size,
> aspect ratio, and placement.
>
> All the graphics is done with low-level (mid-80's) Borland C++
> libraries--all that's really required is the ability to draw points and
> lines, fill rectangles, display text, and pan the display within a
> viewport (which is done by copying display memory).
>
> One approach is to find the applicable X Windows primitives and use
> those. (I know Unix very well, but not X. So that might be a lot of
> work.) Another is to use higher-level facilities and replace my code for
> drawing axes, tick marks, labels, etc. with something else. As you can
> see, there's nothing special about the graphs.
>
> I can't tell from the documentation (and the code) whether I could use
> PLplot for this or not. I need to have multiple charts, not all the same
> size, and I need to have multiple active strip charts (not merely
> multiple pens on the same chart), each being updated asynchronously. I'm
> willing to do some coding and contribute to PLplot, but I'm really
> looking for something that will reproduce existing capabilities quickly.
> I will be interested in better ways of doing things once everything
> works under Linux and I can drop DOS support.
>
> Suggestions, advice?
>
> Steve
>
>
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