How to obtain the minimum values of an array?

조회 수: 1 (최근 30일)
Oscar Espinosa
Oscar Espinosa 2019년 6월 8일
댓글: Oscar Espinosa 2019년 6월 10일
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

채택된 답변

madhan ravi
madhan ravi 2019년 6월 8일
Have a look at mink() else use sort() and pick the first four values if you’re using older version.

추가 답변 (0개)

카테고리

Help CenterFile Exchange에서 Matrices and Arrays에 대해 자세히 알아보기

태그

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by