load Tow_04.txt
height=Tow_04(:,1);
A=Tow_04(:,6)/100000;

k=find(~isnan(A));

figure(1);
subplot(3,2,4)
plot(A(k),height(k),'--',A,height,'o');
axis([0 3 -50 50])
text(1.5, -40, 'Tow 4')

