set output './cart_plot_e.ps' 
set term postscript color enhanced 'Helvetica,18' size 12,10 
set style line 1 lt rgb 'red' lw 3  
set style line 2 lt rgb 'green' lw 3  
set style line 3 lt rgb 'blue' lw 3  
set style line 4 lt rgb 'cyan' lw 3  
set style line 5 lt rgb 'violet' lw 3  
set grid 
set key top left 
set xrange [:]  
set yrange [:]  
set xlabel 'Square of [time since released (seconds)] '  
set ylabel 'Distance rolled (cm)  ' 
set title 'A cart rolling down a track ' 
plot [0:14.0][0:350] './cart_example.dat'     using ($1*$1):2:3 with yerrorbars ls 1 pt 6 ps 0.6   t ''   ,  -0.5599+25.67*(x) lc -1 lw 3 t 'best fit'   ,  -0.5599+26.15*(x) ls 2  t 'max slope'   ,  -0.5599+25.28*(x) ls 3  t 'min slope'  
set output 
quit 
