Re: [Gnuplot-info] question on label positioning / syntax of coloring commands

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

Dr. Ing. Dieter Jurzitza <dieter.jurzitza <at> t-online.de> writes:

> 1.) is there a way to align labels vs. x2 or y2-axis? From the online help I 
> cannot see an option like
> 
> set label "TEXT" axis x1y2 at 1.5,0.7

set label "TEXT" at first 1.5, second 0.7

see 'help coordinates'

> specifically if you have a log - axis on one hand and a non-log axis on the 
> other this would be quite helpful.
> 
> 2.) if I read the command description it says
> 
> set label .....
> ............
> ............
> {textcolor <colorspec>}
> {point <pointstyle>}
> 
> given this, I would expect to say
> 
> set label "TEXT" at 1.5,0.7 tc 3
> 
> However, what I have to write is
> 
> set label "TEXT" at 1.5,0.7 tc lt 3

'help textcolor' says:

...
 Syntax:

       ... {linecolor | lc} {<colorspec> | <n>}
       ... {textcolor | tc} {<colorspec> | {linetype | lt} <n>}

 where <colorspec> has one of the following forms:

       rgbcolor "colorname"
       rgbcolor "#RRGGBB"
       rgbcolor variable       # color is read from input file
       palette frac <val>      # <val> runs from 0 to 1
       palette cb <value>      # <val> lies within cbrange
       palette z
       variable                # color index is read from input file
...

a simple number for textcolor as <colorspec> means nothing,
there is no predefined "colortype" (in contrast to 'linetype')
which one could use.
either you may use the color of a predefined linetype
or you may give the full color specification.

> otherwise it does not work. This is not how I would interpret the given syntax 
> and I cannot imagine anyone who would. Why do I have to reference a linestyle 
> to specify a text color? 
> Is this an error in the online documentation? It may be a necessity from 
> programming standpoint, but from a logical standpoint and from a usability 
> standpoint it is somewhat strange. 
> 
> I would expect "tc" to depict what the user wants to say. Textcolor, that's 
> it. Just my two points after hours of struggling ..... 
> 
> Thank you for looking into this,
> take care
> 
> Dieter Jurzitza
> 
> By the way: I am using gnuplot 4.4 patchlevel 2