gnuplot-info

[Gnuplot-info] Fw: How to get Gnuplot to plot an PNG picture.

[David P. H. Sr. <dp...@co...>]

----- Original Message ----- 
From: David P. Hann Sr. 
To: gnu...@li... 
Sent: Sunday, June 02, 2013 5:31 PM
Subject: How to get Gnuplot to plot an PNG picture.


I need some help. How do I get Gnuplot to plot a PNG picture to my HP7550A plotter? Also, what syntax do I use to get Gnuplot to load my PNG picture from a particular directory, or does my PNG picture have to be located somewhere in the Gnuplot directory? Will I receive replies to this query, or where do I need to go to on Sourceforge to see any answers to my question? Any help offered will be greatly appreciated! Thank you.

Re: [Gnuplot-info] Fw: How to get Gnuplot to plot an PNG picture.

[Ethan A M. <eam...@gm...>]

On Wednesday, 05 June 2013, David P. Hann Sr. wrote:
> 
> ----- Original Message ----- 
> From: David P. Hann Sr. 
> To: gnu...@li... 
> Sent: Sunday, June 02, 2013 5:31 PM
> Subject: How to get Gnuplot to plot an PNG picture.
> 
> 
> I need some help. How do I get Gnuplot to plot a PNG picture to my HP7550A plotter?

Although you can drive this printer directly from gnuplot using
"set term hpgl" or "set term pcl5" (not sure which is correct for that
specific printer model), these driver modes do not support image plots.
I would recommend instead plotting to a PostScript (set term post) 
or PDF file (set term pdf), and then using a separate viewing program
to open that file and print it to your printer.

	Ethan

-- 
Tradition is not the worship of ashes, but the preservation of fire.
  - Gustav Mahler

Re: [Gnuplot-info] Fw: How to get Gnuplot to plot an PNG picture.

[Thomas S. <t.s...@fz...>]

David P. Hann Sr. <dph1134 <at> comcast.net> writes:

> ----- Original Message ----- 
> From: David P. Hann Sr. 
> To: gnuplot-info <at> lists.sourceforge.net 
> Sent: Sunday, June 02, 2013 5:31 PM
> Subject: How to get Gnuplot to plot an PNG picture.
> 
> I need some help. How do I get Gnuplot to plot a PNG picture
> to my HP7550A plotter? Also, what syntax do I use to
> get Gnuplot to load my PNG picture from a particular directory,
> or does my PNG picture have to be located
> somewhere in the Gnuplot directory? Will I receive replies
> to this query, or where do I need to go to on
> Sourceforge to see any answers to my question? Any help
> offered will be greatly appreciated! Thank you.
> 

the hp7550a is a pen plotter, isn't it?

plotting a raster image with a pen-plotter isn't a good idea.
for each pixel pen (x-direction) and paper (y-direction) need
to be positioned and the pen pushed to the paper. for each color
an individual pen is needed.
it would take a long time (hours?) to plot the raster image.

pen plotters were made to draw vectors graphics.