Re: [Gnuplot-info] point type depending on data column

[seb_kramm <seb...@ya...>]

On 05/31/2013 05:13 PM, Ethan A Merritt wrote:
> On Friday, 31 May 2013, seb_kramm wrote:
>> Now, I want to have the type of the point depend on a column of data.
>
> The closest is to use selected single character glyphs instead of
> the predefined point types.  Then you can use a command such as
>
>      set encoding utf8
>      symbol = "+⁕∙∎⊙⊡★☆♠♣♥♦"
>      plot FOO using 1:2:(symbol[int($3):int($3)]) with labels
>
> A more complicated variant using sprintf allows you to also vary
> the color and size of the font used.   See for example
>      http://gnuplot.sourceforge.net/demo_cvs/cities.html

Thanks Ethan, very interesting as usual. However, even if it does work, I don't 
understand how: where does this data specifier come from:
symbol[int($3):int($3)]
I've been searching the pdf doc (4.6) for the string "symbol", found nothing 
relevant, so I'm puzzled...
An undocumented feature ?

Thanks
Sebastien Kramm