Using an if statement to differentiate between odd and even numbers
122 ビュー (過去 30 日間)
古いコメントを表示
Given two Qbar matricies and the number of ply layers in a composite, I am trying to calculate the A,B, and D stress matricies.
My first error is calculating h. Given an even number of ply, h is calculated one way, and given an odd number of ply, h is calculated another way. I have tried coding that below but all my attempts have been unsuccessful.
My second problem is figuring out how to tell matlab that the odd numbered layers draw their values from one Qbar matrix and the even numbered layers draw their values from a different Qbar matrix and all the values are summed.
function[A B D] = ABD(Qbar1,Qbar2,n)
x = 0:1:n;
if n == 2*x+1 % odd number of ply
h = -(n/2):1:(n/2);
elseif n == 2*x % even number of ply
h = -n:1:n;
end
disp(h)
for k = 1:n; i = 1:3; j = 1:3;
for k = [1 3 5]
Qbar(i,j,k) = Qbar1;
end
for k = [2 4]
Qbar(i,j,k) = Qbar2;
end
A(i,j) = Qbar(i,j,k)*(h(k+1)-h(k));
B(i,j) = (1/2)*Qbar(i,j,k)*((h(k+1)^2)-(h(k)^2));
D(i,j) = (1/3)*Qbar(i,j,k)*((h(k+1)^3)-(h(k)^3));
end
0 件のコメント
回答 (1 件)
Jon Brenner
2013 年 11 月 26 日
In order to determine if a number is odd or even in MATLAB, use the mod function.
if mod(x, 2) == 0
% x is even
else
% x is odd
end
2 件のコメント
Jon Brenner
2013 年 11 月 26 日
編集済み: Jon Brenner
2013 年 11 月 26 日
If you replace x with n and copy what you were trying to do into my if statement, you get this:
if mod(n, 2) == 0
% n is even
h = -n:1:n;
else
% n is odd
h = -(n/2):1:(n/2);
end
参考
カテゴリ
Help Center および File Exchange で Operating on Diagonal Matrices についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!