set output './cart_plot_f.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 right 
set xrange [:]  
set yrange [:]  
set xlabel 'Time since released (seconds)  '  
set ylabel 'Average acceleration (cm/s*s)  ' 
set title 'A cart rolling down a track ' 
plot [0.5:3.5] './cart_accel.dat'     using 1:2:3 with yerrorbars ls 1 pt 6 ps 1.2   t ''  
set output 
quit 
