load Tow_02.txt
height=Tow_02(:,1);
A=Tow_02(:,6)/100000;
PH=Tow_02(:,7);

scl=A(3)/PH(3);
kp=find(isnan(A) & ~isnan(PH));
A(kp)=scl*PH(kp);
k=find(~isnan(A));

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

