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Plot with boxes and Pipe Questions - May 11, 2015

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Posted by E.D.G. May 11, 2015

"Plot With Boxes" and Fortran - Windows - Gnuplot Pipe Questions


PLOT WITH BOXES

       Running in a Windows environment, my Perl language programs are 
storing large amounts of data in files.  Gnuplot is instructed to start 
running (pgnuplot.exe).  And a "Pipe" is being opened between the Perl 
programs and Gnuplot.  Commands are sent to Gnuplot using that Pipe.

       I would like to have Gnuplot display filled boxes using those data. 
And I need to know what the format of the Plot command should be and what 
type of data should be stored in the data files.

---  The boxes need to be two dimensional "filled."  The boarders can be 
either absent or the same color as the fill.

---  I am planning to put X and Y coordinate information for the boxes in 
the data files.

---  I would like to eventually have a box color option for the box fill. 
But for the moment, just filling them with light or dark shades of black 
would be fine.

---  In the data file along with the X and Y coordinates of the boxes I can 
include a darkness number for a given box.  Right now the range is 0 to 100 
with 0 being blank or white and 100 being completely black.  I can convert 
those numbers to any range.  And I could also use a color system such as the 
RGB if necessary.

       So, what would be the command code?  The furthest I myself could get 
without making this a major research project was the following code:

plot "data.dat' with boxes

       Attempts to get the box color and fill part of the command to work 
just right were unsuccessful.


FORTRAN - WINDOWS - GNUPLOT PIPE QUESTIONS

       My Perl language programs running in a Windows environment are 
gradually being converted to Fortran F95 for increased calculation speed. 
And I am trying to determine how to open a Windows environment Fortran F95 
or gfortran "Pipe" to Gnuplot so that Gnuplot can be told when and how to 
create charts.

       Presently, my Perl programs first tell an older version of 
pgnuplot.exe to start running.  Then they use the following Open command to 
create a Pipe to Gnuplot.

open gnuplot, '|pgnuplot.exe';

       Any commands can then be "printed" to the Perl "output file" gnuplot. 
And Gnuplot executes them.

       It took a lot of time and effort to get Perl to work with Gnuplot 
like that.  But it was worth it as the charts that Gnuplot creates can run 
in an interactive mode under the control of my Perl programs.  And when a 
chart looks like it is ready for storage as a file, the Perl programs will 
store it as a .png file that I can send to other researchers and post on my 
Web sites.

       Does anyone know how that open pipe command would work for Fortran 
F95 or gfortran?

       Other Fortran programming personnel are interested in learning how 
Fortran could control Gnuplot like that.  I posted notes to the Fortran 
Newsgroup.  But no one could easily answer that question.  And a retired 
professional programmer that I work with who is doing the Fortran 
conversions was unable to determine how to open a Fortran - Windows - 
Gnuplot type of Pipe.

Regards to all,

E.D.G.

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Thread

Plot with boxes and Pipe Questions - May 11, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-05-11 06:31 -0500
  Re: Plot with boxes and Pipe Questions - May 11, 2015 Hans-Bernhard Bröker <HBBroeker@t-online.de> - 2015-05-14 00:45 +0200
    Re: Plot with boxes and Pipe Questions - May 11, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-05-15 05:45 -0500
      Re: Plot with boxes and Pipe Questions - May 11, 2015 "E.D.G." <edgrsprj@ix.netcom.com> - 2015-05-15 07:19 -0500
  Re: Plot with boxes and Pipe Questions - May 11, 2015 Gavin Buxton <gavinbuxton@gmail.com> - 2015-05-14 07:09 -0700

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