Plotting with objects [new]

The latest version of gnuplot has some new commands for plotting with objects, which are geometrical shapes including rectangles, circles, ellipses, and polygons. In order to show off the flexibility of gnuplot's new object plotting commands, we have abused them in order to create something that is not part of gnuplot's normal repertoire: a pie chart. The following is a pie chart made using objects in gnuplot:

How to do it…

Following is the dark magic that can coerce gnuplot to render the previous figure:

unset key
unset tics
set object 1 circle at graph .5,.5 size graph .25 fillcolor rgb 'blue' fillstyle solid \
  arc [0:30] front                                                                       
set object 2 circle at graph .5,.5 size graph .25 fillcolor rgb 'red' fillstyle solid \
  arc [30:80] front                                                                      
set object 3 circle at graph .5,.5 size graph .25 fillcolor rgb 'orange' fillstyle solid...