finding a number in the vector equal or around a desired number

I am trying to the from dleta_A vector a number equal to 3.1528 or two numbers rounded up and down for the desired number

V_breadth = 12;
d_Vd = 0:0.005:2;
V_Draft_min = 0.5;
V_breadth_min = 0.4*V_breadth;
V_breadth_max = 0.8*V_breadth;
for i = 1:1:length(d_Vd)
V_Draft_new(i) =V_Draft_min+ d_Vd(i);
tan_theta = (V_Draft - V_Draft_min )/(0.5*(V_breadth_max-V_breadth_min));
Vb(i) = V_breadth_min +  (d_Vd(i).*(2/tan_theta));
dleta_A(i) = (V_breadth_min+ Vb(i)) *d_Vd(i)/2;
end
V_Draft_new 
Vb
dleta_A

Answer 1

[Image Analyst]

Try this

% Create sample data
dleta_A = 4 * rand(1, 1000)

dleta_A = 1×1000

1.3165 0.9536 1.6464 3.0427 3.4164 2.8714 2.8714 1.5470 3.9519 3.3921 2.2466 3.1289 2.5613 3.5461 3.0159 3.7663 3.6834 1.4579 3.4715 1.1341 3.1148 3.3452 2.9969 0.6242 2.5960 3.9745 2.0811 1.2933 0.1543 1.7560

% Find element of dleta_A that is closest to 3.1528.
differences = abs(dleta_A - 3.1528);
[minDifference, indexOfMin] = min(differences)

minDifference = 0.0022

indexOfMin = 871

closestValue = dleta_A(indexOfMin)

closestValue = 3.1550

[Othman Alkandri]

Thanks alot worked ;).