Re: Gnuplot 4.6

[Juan Pablo Carbajal]

On Sat, Dec 14, 2013 at 8:08 PM, Benjamin Abbott <address@hidden> wrote:
> On Dec 14, 2013, at 1:11 PM, Juan Pablo Carbajal <address@hidden> wrote:
>>
>>> On Sat, Dec 14, 2013 at 6:30 PM, Ben Abbott <address@hidden> wrote:
>>>> On Dec 14, 2013, at 11:50 AM, Juan Pablo Carbajal <address@hidden> wrote:
>>>>
>>>>> On Sat, Dec 14, 2013 at 5:36 PM, Ben Abbott <address@hidden> wrote:
>>>>>
>>>>>> On Dec 14, 2013, at 7:16 AM, Juan Pablo Carbajal <address@hidden> wrote:
>>>>>>
>>>>>> Hi Ben,
>>>>>>
>>>>>> I have seem some amazing improvements on gnuplot quality by adding the
>>>>>> cairo library. Is GNU Octave exploiting this extended features
>>>>>> already?
>>>>>> http://gnuplot.sourceforge.net/demo_svg/
>>>>>
>>>>> I don't think so. When I rewrote the print functionality to allow for 
>>>>> multiple toolkits, I tried to streamline everything as much as possible 
>>>>> to reduce maintenance and bugs. My approach was to have the print() 
>>>>> behave similarly for all toolkits.  Unless there are changes I'm unaware 
>>>>> of, the FLTK and gnuplot toolkits each begin by creating a eps-file and 
>>>>> then convert it to the desired format using epstool, epstoedit, transfig, 
>>>>> and/or ghostscript.
>>>>>
>>>>> For gnuplot, it is possible to do things differently, but there will be 
>>>>> other features.  For example, the linestyles and markertypes are not 
>>>>> consistent across different terminals.  Surprisingly even the fontsize 
>>>>> may change across different terminals (specifying a fontsize of 12 points 
>>>>> doesn't always mean you'll get a a font with a size of 12 points).  All 
>>>>> of this manageable, but since these features are opportunities for bugs, 
>>>>> I choose to avoid them in the initial implementation.
>>>>>
>>>>> Ben
>>>>
>>>> Do you think is possible to have the cairo terminal as an option for
>>>> the gnuplot toolkit?
>>>
>>> I'm not clear on the details of what you'd like to do.
>>>
>>> If you just want to switch from "set term postscript eps ..." to "set term 
>>> epscairo ...", that should be fairly straight forward.  The 
>>> __gnuplot_has_feature__() function will likely need to be modified to check 
>>> if the epscairo terminal is supported.  And the "set term ..." command will 
>>> need to be modified to support the syntax for epscairo.  The terminal 
>>> commands are below.
>>>
>>> set terminal postscript {landscape | portrait | eps}
>>>        {enhanced | noenhanced}
>>>        {defaultplex | simplex | duplex}
>>>        {fontfile [add | delete] "<filename>" | nofontfiles} 
>>> {{no}adobeglyphnames}
>>>        {level1 | leveldefault}
>>>        {color | colour | monochrome}
>>>        {background <rgbcolor> | nobackground}
>>>        {solid | dashed}
>>>        {dashlength | dl <DL>}
>>>        {linewidth | lw <LW>}
>>>        {rounded | butt}
>>>        {clip | noclip}
>>>        {palfuncparam <samples>{,<maxdeviation>}}
>>>        {size <XX>{unit},<YY>{unit}}
>>>        {blacktext | colortext | colourtext}
>>>        {{font} "fontname{,fontsize}" {<fontsize>}}
>>>        {fontscale <scale>}
>>>
>>> set term epscairo ...
>>>        {{no}enhanced} {mono|color} {solid|dashed}
>>>        {font <font>} {fontscale <scale>}
>>>        {linewidth <lw>} {rounded|butt} {dashlength <dl>}
>>>         {size <XX>{unit},<YY>{unit}}
>>>
>>> Ben
>>
>> that's pretty concrete!
>> I was thinking to add this one
>>
>> set term svg enhanced
>>
>> I guess is the same chore, I will look into it.
>
> That will be more difficult, and will make the code hard to follow.  If you 
> want to produce svg output using gnuplot, you can use the drawnow() function.
>
> I'm not on front of my computer now, and am not confident about the exact 
> syntax, but "help drawnow" should clear that up.
>
> Off the top of my head, the syntax is something like ...
>
> drawnow("svg", "/dev/null", false, " plot.svg")
>
> Ben

I did not get that one. I can print to svg, no problem. the issue is
that then I usually spend some time making the plot more attractive.
The svg output on the demo site of gnuplot 4.6 already look quite
nice, they are using the svg enhanced terminal. Therefore my question.