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

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

On Friday, 31 May 2013, seb_kramm wrote:
> Hello,
> 
> When plotting points from a datafile, gnuplot offers me the ability to change the 
> color of the point depending of some column:
> plot "datafile" using 1:2:3 with points palette
> 
> I can also have the size of the point depend on a column of data:
> plot "datafile" using 1:2:3 with points ps variable
> 
> 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