gnuplot-info

Re: [Gnuplot-info] Gathering Errors in Batch mode

[Hans-Bernhard B. <br...@ph...>]

On Sat, 15 May 2004, Lauren Clarke wrote:

> When running on MS Windows, is there any mechanism whereby the errors that
> would be displayed in interactive mode (with LOAD), can be sent to a file
> when running in batch mode? Or, perhaps more simply, what is the proper way
> to get error messages in batch mode?

If you use wgnuplot_pipes.exe from the distributed Win32 binary package, I 
think you can just redirect its stderr the usual way.  If not, then I
would presume it's still just as impossible as it always was. ;-(

-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

RE: [Gnuplot-info] Gathering Errors in Batch mode

[Hans-Bernhard B. <br...@ph...>]

On Sun, 16 May 2004 li...@co... wrote:

> At this point, I'm not sure if it's the OS or wgnuplot_pipes. 

The latter.  The OS (or more precisely: the command line shell) should
know what to do with 2>.

> Are there any docs for wgnuplot_pipes, or shall I inspect the source?

I'm not aware of any docs other than what Petr may have put into the
README of the binary package.

> Given what I've read about wgnuplot_pipes, it seems like this would be a
> pretty standard use-case, it's a shame to have my hopes dashed at this
> point, but I've lived this long without it, I suppose I can continue ;-).

Actually, the major use case is to have a gnuplot on Windows that supports
piping from within, as in back-tick expansion, data file filtering and
output to pipes:

	set title `my_title_generator`
	set out "| lpr -P myprinter"
	plot '< awk -f myscript datafile'

The fact that it causes wgnuplot to display a console is a side-effect
of the actual modification.

In the end, I suspect we'ld have to rewrite large parts of, possibly the
entire MS Windows text output routines in gnuplot (i.e. src/win/wtext.c).
I once started down that road, but never made it very far, and didn't 
publish the results.

-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

RE: [Gnuplot-info] Gathering Errors in Batch mode

[Hans-Bernhard B. <br...@ph...>]

On Tue, 18 May 2004, Lauren Clarke wrote:

> Interesting idea... If no one sees any immediate roadblocks to this, I might
> just try it. 
> 
> I'm not all that familiar with the innards of gnuplot, but have utilized
> cygwin before. Anyone have any hunches which environment (mingw, or cygwin)
> would be the most likely to yield results?

Either will, because they're essentially the same thing.  You can use the
Win32+X11 binary provided on our download sites, I think.


-- 
Hans-Bernhard Broeker (br...@ph...)
Even if all the snow were burnt, ashes would remain.

RE: [Gnuplot-info] Gathering Errors in Batch mode

[<li...@co...>]

Hi Hans-Bernhard, 

Thanks for the quick reply. 

If, by "redirect its stderr the usual way" you mean something like:

wgnuplot_pipes test.gnu 2>errors.txt

I'm not getting it to work. In the case above, I get an empty errors.txt
file (regardless of whether the test.gnu has an error or not). 

At this point, I'm not sure if it's the OS or wgnuplot_pipes. Are there any
docs for wgnuplot_pipes, or shall I inspect the source?

Given what I've read about wgnuplot_pipes, it seems like this would be a
pretty standard use-case, it's a shame to have my hopes dashed at this
point, but I've lived this long without it, I suppose I can continue ;-).

-lc

> -----Original Message-----
> From: gnu...@li... [mailto:gnuplot-info-
> ad...@li...] On Behalf Of Hans-Bernhard Broeker
> Sent: Saturday, May 15, 2004 4:17 PM
> To: Lauren Clarke
> Cc: gnu...@li...
> Subject: Re: [Gnuplot-info] Gathering Errors in Batch mode
> 
> On Sat, 15 May 2004, Lauren Clarke wrote:
> 
> > When running on MS Windows, is there any mechanism whereby the errors
> that
> > would be displayed in interactive mode (with LOAD), can be sent to a
> file
> > when running in batch mode? Or, perhaps more simply, what is the proper
> way
> > to get error messages in batch mode?
> 
> If you use wgnuplot_pipes.exe from the distributed Win32 binary package, I
> think you can just redirect its stderr the usual way.  If not, then I
> would presume it's still just as impossible as it always was. ;-(
> 
> --
> Hans-Bernhard Broeker (br...@ph...)
> Even if all the snow were burnt, ashes would remain.
> 
> 
> 
> 
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