Comparing values of a vector
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Hello All, How are you?
I would like to compare every value of my vector x to the following statement: 0≤x≤P
If x is between 0 and P use this formula to calculate Zc
Zc = (M/P^2)*(2*P.*x - x.^2); % 0≤x≤P
If x is within P and 1, use this formula to calculate Zc
Zc = (M/(1-P)^2)*((1-2*P) + 2*P.*x - x.^2);% P≤x≤1
And I also would like to store the values of Zc from both formulas in a single variable Zc
How can I do this?
Please find the code below:
M = 4/100; % Max Camber.
P = 4/10; % Location of Max Camber.
tmax = 18/100; % Maximum airfoil thickness.
% Mean Camber Line.
x = [0:0.01:1];%chord.
if any(x == 0)
Zc = (M/P^2)*(2*P.*x - x.^2); % 0≤x≤P
else
Zc = (M/(1-P)^2)*((1-2*P) + 2*P.*x - x.^2);% P≤x≤1
end
Thank you in advance !
采纳的回答
Rik
2021-4-9
This is the easiest way to do it vectorized:
Zc_0_to_P =@(x) (M/P^2)*(2*P.*x - x.^2); % 0≤x≤P
Zc_P_to_1 =@(x) (M/(1-P)^2)*((1-2*P) + 2*P.*x - x.^2);% P≤x≤1
x = 0:0.01:1;
%pre-allocate with NaN so we can spot skipped values (if any)
Zc=NaN(size(x));
L= 0<=x & x<=P;
Zc(L)=Zc_0_to_P(x(L));
L= P<=x & x<=1;%this overlaps with the previous condition for x=P
Zc(L)=Zc_P_to_1(x(L));
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