set output './complex_b.ps' 
set term postscript color enhanced 'Helvetica, 18'  
set style line 1 lt rgb 'red' lw 3  
set style line 2 lt rgb 'sea-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 ylabel 'Pressure (N/m^2)' 
set xlabel 'Time (s)' 
set title 'Fundamental plus one harmonic '
set samples 1000 
plot [-0.03:0.03][-2.0:2.0] 1*cos(628.318*x)    + 0.5*1*cos(3.0*628.318*x)    with lines       ls 1  t '' 
 
set output 
quit 
