gnuplot> a(x)=91.25e-21*x
gnuplot> b(x)=0.8125/x
gnuplot> T1(x)=(sin((1-a(x))*b(x)))**2/((1-a(x))**2)
gnuplot>
T2(x)=(N*0.927*sin(b(x))*sin(a(x)*b(x))*sin((1-a(x))*b(x)))/(a(x)*(1-a(x)))
gnuplot> T3(x)=(S*0.927*cos(b(x))*sin(a(x)*b(x))*sin((1-a(x))*b(x)))/(a(x)*(1-a(x)))
gnuplot> T4(x)=0.5*0.86*(sin(a(x)*b(x)))**2/((a(x))^2)
gnuplot> Y(x)=(0.08*T1(x)-d*0.2828*T2(x)+d*0.2828*T3(x)+(d**2)*T4(x))
gnuplot> plot N=0, S=0, Y(x);plot N=0, S=1, Y(x)
non-integer passed to boolean operator