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Colour, no gif

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  Colour, no gif Dieter Britz <dieterhansbritz@gmail.com> - 2011-12-09 16:50 +0100
    Re: Colour, no gif Christoph Bersch <usenet@bersch.net> - 2011-12-09 16:28 +0100
    Re: Colour, no gif sfeam <sfeam@users.sourceforge.net> - 2011-12-09 15:57 -0800
      Re: Colour, no gif Dieter Britz <dieterhansbritz@gmail.com> - 2011-12-12 11:07 +0100
      Re: Colour, no gif Dieter Britz <dieterhansbritz@gmail.com> - 2011-12-14 15:06 +0100
        Re: Colour, no gif Christoph Bersch <usenet@bersch.net> - 2011-12-14 14:58 +0100
          Re: Colour, no gif Dieter Britz <dieterhansbritz@gmail.com> - 2011-12-15 10:44 +0100
            Re: Colour, no gif sfeam <sfeam@users.sourceforge.net> - 2011-12-15 13:17 -0800

#734 — Colour, no gif

Until recently I have used the terminal type "gif" which allowed me
a coloured canvas. A gnuplot update has now removed gif from the
terminal types.
Can I have a coloured canvas with postsctipt enh eps, or what
terminal type is there that will allow me this, and how do I specify
the colour? I have tried postscript enh eps, adding rgb "#010101",
but gnuplot says it doesn't know rgb.
-- 
Dieter Britz (dieterhansbritz<at>gmail.com)

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#735

On 09.12.2011 16:50, Dieter Britz wrote:
> Until recently I have used the terminal type "gif" which allowed me
> a coloured canvas. A gnuplot update has now removed gif from the
> terminal types.

The current CVS version still supports GIF, so you must be more specific 
to which version you updated, where you got the update from, on which 
platform etc.

> Can I have a coloured canvas with postsctipt enh eps, or what
> terminal type is there that will allow me this, and how do I specify
> the colour? I have tried postscript enh eps, adding rgb "#010101",
> but gnuplot says it doesn't know rgb.

In the CVS version there is a terminal option 'background':
set terminal postscript enh eps background rgb "#010101"

For other terminals or gnuplot versions you can use e.g. (all on one 
line, don't know if there is a shorter version of this):

set object rectangle back from screen 0, screen 0 to screen 0.5, screen 
1 fc rgb "#550000" fillstyle solid 1.0 noborder

Christoph

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#736

Dieter Britz wrote:

> Until recently I have used the terminal type "gif" which allowed me
> a coloured canvas. A gnuplot update has now removed gif from the
> terminal types.

For the last 10+ years, gnuplot has generated gif output through the
external library libgd.   This has not changed on the gnuplot end, so
I am guessing this means you no longer have libgd installed. 

> Can I have a coloured canvas with postsctipt enh eps, or what
> terminal type is there that will allow me this, and how do I specify
> the colour? I have tried postscript enh eps, adding rgb "#010101",
> but gnuplot says it doesn't know rgb.

In the current version (4.4) the most general way to do this is to
specify a filled rectangle that exactly fills the screen, or the
graph, and is placed behind everything else.  This works for all
terminals that support filled rectangles.

Example:
	http://gnuplot.sourceforge.net/demo/rectangle.html

In the next release most terminals will support a "background" keyword
that does this more cleanly.


.

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#742

sfeam wrote:

> Dieter Britz wrote:
> 
>> Until recently I have used the terminal type "gif" which allowed me
>> a coloured canvas. A gnuplot update has now removed gif from the
>> terminal types.
> 
> For the last 10+ years, gnuplot has generated gif output through the
> external library libgd.   This has not changed on the gnuplot end, so
> I am guessing this means you no longer have libgd installed.

This makes sense - I have had things disappear on me before. How do I check
whether I have it or not? I work under Suse Linux.
-- 
Dieter Britz (dieterhansbritz<at>gmail.com)

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#747

sfeam wrote:

> Dieter Britz wrote:
> 
>> Until recently I have used the terminal type "gif" which allowed me
>> a coloured canvas. A gnuplot update has now removed gif from the
>> terminal types.
> 
> For the last 10+ years, gnuplot has generated gif output through the
> external library libgd.   This has not changed on the gnuplot end, so
> I am guessing this means you no longer have libgd installed.
> 
>> Can I have a coloured canvas with postsctipt enh eps, or what
>> terminal type is there that will allow me this, and how do I specify
>> the colour? I have tried postscript enh eps, adding rgb "#010101",
>> but gnuplot says it doesn't know rgb.
> 
> In the current version (4.4) the most general way to do this is to
> specify a filled rectangle that exactly fills the screen, or the
> graph, and is placed behind everything else.  This works for all
> terminals that support filled rectangles.
> 
> Example:
> http://gnuplot.sourceforge.net/demo/rectangle.html
> 
> In the next release most terminals will support a "background" keyword
> that does this more cleanly.

Thanks, that helped. I have now solved the problem by letting gnuplot
output an eps file which I then convert to jpg by hand using the Gimp.
See the results here: http://www.dieterbritz.dk/fusweb/stats.html
-- 
Dieter Britz (dieterhansbritz<at>gmail.com)

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#748

On 14.12.2011 15:06, Dieter Britz wrote:
>
> Thanks, that helped. I have now solved the problem by letting gnuplot
> output an eps file which I then convert to jpg by hand using the Gimp.
> See the results here: http://www.dieterbritz.dk/fusweb/stats.html

Well, this is a rather ugly workaround. If you go this way, for the kind 
of pictures you showed it is better to use PNG rather than JPEG. 
Alternatively, do you have the pngcairo terminal?

To fix your gnuplot: Which SuSE version do you have? From where do you 
have gnuplot?

Christoph

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#750

Christoph Bersch wrote:

> On 14.12.2011 15:06, Dieter Britz wrote:
>>
>> Thanks, that helped. I have now solved the problem by letting gnuplot
>> output an eps file which I then convert to jpg by hand using the Gimp.
>> See the results here: http://www.dieterbritz.dk/fusweb/stats.html
> 
> Well, this is a rather ugly workaround. If you go this way, for the kind
> of pictures you showed it is better to use PNG rather than JPEG.
> Alternatively, do you have the pngcairo terminal?
> 
> To fix your gnuplot: Which SuSE version do you have? From where do you
> have gnuplot?
> 
> Christoph

You are asking an embarrassing question... I have, at work, Open Suse 10.2.
I know I should upgrade but it would mean re-installing some programs,
such as Fortran, etc, and as long as it's working, I am not keen on that.
I did upgrade gnuplot a while ago but it doesn't let me use gif or png,
hence this awkward way of doing it. The particular application here is
something that doesn't change very often (cold fusion is not very active
these days and there are only a few papers per year, none in 2011), so I
can put up with the manual operations.
-- 
Dieter Britz (dieterhansbritz<at>gmail.com)

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#751

Dieter Britz wrote:

> Christoph Bersch wrote:
> 
>> On 14.12.2011 15:06, Dieter Britz wrote:
>>>
>>> Thanks, that helped. I have now solved the problem by letting gnuplot
>>> output an eps file which I then convert to jpg by hand using the Gimp.
>>> See the results here: http://www.dieterbritz.dk/fusweb/stats.html
>> 
>> Well, this is a rather ugly workaround. If you go this way, for the kind
>> of pictures you showed it is better to use PNG rather than JPEG.
>> Alternatively, do you have the pngcairo terminal?
>> 
>> To fix your gnuplot: Which SuSE version do you have? From where do you
>> have gnuplot?
>> 
>> Christoph
> 
> You are asking an embarrassing question... I have, at work, Open Suse
> 10.2. I know I should upgrade but it would mean re-installing some
> programs, such as Fortran, etc, and as long as it's working, I am not keen
> on that. I did upgrade gnuplot a while ago but it doesn't let me use gif
> or png, hence this awkward way of doing it. 

The usual cause of this problem (lack of support for a particular terminal)
is that at the time gnuplot was configured and built the "development" package
for the corresponding support library was not present.  To get png support
you could rebuild gnuplot yourself from source, first making sure that 
libgd2-devel is installed on your machine.  Or, as Christoph Bersch pointed
out, you could also get png support by installed the pango+cairo development
libraries.  But that involves many extra packages compared to libgd, which
is relatively self-contained.

	Ethan

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