How to obtain the minimum values of an array?

Question

Oscar Espinosa 2019-6-8

0
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https://ww2.mathworks.cn/matlabcentral/answers/466102-how-to-obtain-the-minimum-values-of-an-array

评论： Oscar Espinosa 2019-6-10

I'm trying to get the minimum values of three vectors. Assuming that the length of the vectors is 1x4, I need to get 4 minimums. Also one of the vectors has as values a constant. I'm attaching the code. The important part is on lines 12 to 15.

function [x_t,Re,eta_c,C_f] = CXAPWING(b,b_slats,x_thickness,x_camber,M)
%%% Коэффициент профильного сопротивления крыла
h_polish = 1e-6;  %micro
V = M*299.45;
Re = V*b/3.5232e-5;
  
F1 = 1.3+0.6*M*(1-0.25*M^2);
hbRe = h_polish*V/3.5232e-5;
F2 = log10(abs(hbRe-1));
F3 = (2.2-0.08*M^2)/(1+0.312*M);
n = 5+F1*(1-(F2/F3)^2)^0.5;
x_t_1 = 10^n/Re;
x_t_2 = sqrt(x_thickness*x_camber);
x_t_3 = b_slats/b;
x_t = min([x_t_1 x_t_2 x_t_3]);
if Re < 4.85e5
  C_f = 1.328/sqrt(Re);
elseif Re > 3e7
  C_f = 0.455/(log10(Re))^2.58;
else
  C_f = (0.455./log10(Re).^2.58).*((1-x_t+(40*x_t^0.625)/Re.^0.375).^0.8)';
end
% nc_xt = [1.4072 1.3722 1.3536 1.3103 1.2557; 0 0.1 0.2 0.3 0.4]; % 0.11
nc_xt = [1.3323 1.3063 1.2917 1.2552 1.2115; 0 0.1 0.2 0.3 0.4]; %0.09
if x_t > 0 && x_t < 0.1
  eta_c = INTERPOLATION(nc_xt(2,1),nc_xt(1,1),nc_xt(2,2),nc_xt(1,2),x_t);
elseif x_t > 0.1 && x_t < 0.2
  eta_c = INTERPOLATION(nc_xt(2,2),nc_xt(1,2),nc_xt(2,3),nc_xt(1,3),x_t);
elseif x_t > 0.2 && x_t < 0.3
  eta_c = INTERPOLATION(nc_xt(2,3),nc_xt(1,3),nc_xt(2,4),nc_xt(1,4),x_t);
else x_t > 0.3 && x_t < 0.4
  eta_c = INTERPOLATION(nc_xt(2,4),nc_xt(1,4),nc_xt(2,5),nc_xt(1,5),x_t);
end
end