For loop if else if statement not working

I am trying to make a graph where two different sets of equations need to be used at different h values but i keep getting the error code "Undefined function 'h' for input arguments of type 'double'"

can anyone correct my code and explain to me why this is wrong? Thanks

g=32.2;
R=1716;
a=-0.003563;
x = g./(a.*R);
y = g/R;
T_SSL=518.69;
rho_SSL=0.002377;

hv = 1:50:45000;
for i = 1:numel(hv)
  if (h(i) <= 36152)
    % lower then 36152
    h(i) = hv(i);
    T(i) = T_SSL+a*h(i);
    rho(i) = rho_SSL*((T(i)/T_SSL)^-(x+1));
   TH(i) = 6647034.077*rho(i);
  elseif(h(i) > 36152)
   % for over 36152 ft
   h(i) = hv(i);
   T(i) = 389.7;
   rho(i) = rho_SSL*exp(-(y/T(i))*h(i));
   TH(i) = 6647034.077*rho(i);
  end
end

plot (h,TH);

xlabel('Altitude (ft)');
ylabel('Power Avaiable (hp)');
title('Power Avaiable vs Altitude');

Answer 1

[KSSV]

g=32.2;
R=1716;
a=-0.003563;
x = g./(a.*R);
y = g/R;
T_SSL=518.69;
rho_SSL=0.002377;
hv = 1:50:45000;
for i = 1:numel(hv)
  if (hv(i) <= 36152)
    % lower then 36152
    h(i) = hv(i);
    T(i) = T_SSL+a*h(i);
    rho(i) = rho_SSL*((T(i)/T_SSL)^-(x+1));
   TH(i) = 6647034.077*rho(i);
  elseif(hv(i) > 36152)
   % for over 36152 ft
   h(i) = hv(i);
   T(i) = 389.7;
   rho(i) = rho_SSL*exp(-(y/T(i))*h(i));
   TH(i) = 6647034.077*rho(i);
  end
end
plot (h,TH);
xlabel('Altitude (ft)');
ylabel('Power Avaiable (hp)');
title('Power Avaiable vs Altitude');

Variable should be hv not h. Code need to be tuned a lot.

[Austen Thomas]

Thanks! I am relatively new to matlab if you could give me any pointers it would be appreciated

Answer 2

[Use]

Austen Thomas, have you solved this problem? I also got same problem.