Re: [Plplot-general] Does plplot have an equivalent of PGPLOT's /xserve device?

[Thomas M. <t.r...@wa...>]

Hi Arjen,

thanks for your reply. plflush *without* a plend sort of works with "tk",
but has significant problems -- see below. What I want to do is not quite
as you summarise; sorry for not being clear. Its not so much that I want to
resume plotting -- I imagine plflush would be good for this -- but I want
the plot to finish but then to persist and not simply disappear. I
sometimes have multiple such plots in windows on my screen, potentially
produced by independent scripts. When I am done with them I can click the
"X" at the top-right to get rid of them. I have not managed to replicate
this way of working with plplot. When I used plflush without plend, my test
script exited and the plot remained (with "tk" but not "xwin"). I ran the
script a couple of times and produced two such plots. However, hearing my
laptop's fan crank up, a look with "top" revealed two processes called
"plserver" each running at 120% CPU [server talking to non-existent script
perhaps?], so I think the absence of "plend" was not good, and this
solution is not workable. If I stick plend back in, then I get the same
instant disappearance of the plot when I set plspause(False) whether I use
plflush or not, unsuprisingly I think, as I imagine plend flushed the
graphics.

tom




On 1 May 2014 08:56, Arjen Markus <Arj...@de...> wrote:

>  Hi Thomas,
>
>
>
> If I understand you correctly, you are looking for an on-screen device
> that displays the results, drops out of the event loop to allow the program
> to continue and does not close, so that later on you can resume the
> plotting. (As I do not know PGPLOT, I want to make sure I understand it.)
> plspause() will do that indeed, but the graphics buffer may get in the way.
>
>
>
> Try using plflush() at the end of drawing the graph. I have not tried it,
> but I think that will help.
>
>
> Regards,
>
>
>
> Arjen
>
>
>
>
>
> *From:* Thomas Marsh [mailto:t.r...@wa...]
> *Sent:* Thursday, May 01, 2014 9:46 AM
> *To:* plp...@li...
> *Subject:* [Plplot-general] Does plplot have an equivalent of PGPLOT's
> /xserve device?
>
>
>
> Hello, I am new to plplot, but I am trying to check it for a number of
> applications I have in mind within C++ and Python codes as a replacement
> for PGPLOT which I have used for years.  I am starting with the Python
> binding to explore plplot's features. The interactive device I use most of
> all with PGPLOT is "/xserve" which allows you to generate a plot that
> persists after a program / script exits and returns control to the
> terminal. I use this feature all the time. Within long running programs, it
> allows me to generate plots which I can look at while the program continues
> doing something else. With plplot's xwin or tk, I can get a plot that
> persists, but it seems to block until I have actively quitted it. I
> experimented with calling plspause(False) just before plend but then the
> plot just flashes briefly with tk and does not appear at all with xwin.
>
> I feel I am missing something obvious, but haven't found it yet. Thanks in
> advance for any help,
>
> tom
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