How to solve "Index exceeds the number of array elements (39)."

When i run this code, it states:

Index exceeds the number of array elements (39).

Error in Structure2 (line 218)

z0Le(i) = z0LtW(i-1);

How can i fix this?

N=79

%% Stress Analysis
% Wing Stress Analysis
r = mod(N,2);               %N is number of coordinate point airfoil
if r == 0
    n = N/2;
else
    n = (N+1)/2;
end

x0UW = x0(1:n,1);
z0UW = y0(1:n,1);
x0LtW = x0(n+1:N,1);
z0LtW = y0(n+1:N,1);

for i = 1:n+1
    if i == 1
        z0Le(i) = 0;
        x0Le(i) = 0;
    else
        z0Le(i) = z0LtW(i-1);
        x0Le(i) = x0LtW(i-1);
    end
end

[Oren B]

i can't check your code cuse you have

missing parameter value: x0 , y0

Answer 1

[KALYAN ACHARJYA]

The problem is here

z0Le(i) = z0LtW(i-1);
x0Le(i) = x0LtW(i-1);

When the loop iterate for first i=1, then, in the else statements,

z0LtW(i-1) becomes z0LtW(1-1)>> z0LtW(0);

MATLAB doesnot have zero indexing concept, as other programming allows (like python) either you have start the iteration from i=2 to.. or change the statements, so that it avoid (0) indexing in all statements.

For example:

x(1)>>Allow
x(2)>>Allow
x(100)>>Allow
x(-2)>>Not Allow
x(0)>>Not Allow
x( ) 
% ^Must be always real positive number

Hope you get the sufficients hints to solve the issue

Good Luck!