How to fix "The size of the indicated variable or array appears to be changing with each loop iteration?"
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Hello Guys,I am student and doing some project on Torsional constant for any cross section . I am using mat lab and i could not fix one error message.Is there any one can help me? (I got this code on internet which one gentle man did his research on this field ) Here is the code fragment
A = sparse( size(coordinates,1), size(coordinates,1) );
for j = 1 : size(elements3,1)
A(elements3(j,:),elements3(j,:)) = A(elements3(j,:),elements3(j,:)) + ...stima3(coordinates(elements3(j,:),:));
end
Here is the error message "The size of the indicated variable or array appears to be changing with each loop iteration. Commonly, this message appears because an array is growing by assignment or concatenation. Growing an array by assignment or concatenation can be expensive. For large arrays, MATLAB must allocate a new block of memory and copy the older array contents to the new array as it makes each assignment"
3 个评论
Henric Rydén
2014-6-11
What is the size of coordinates?
What is the size of elements3? Do you know that size before the loop begins?
回答(1 个)
merina amon
2020-8-18
facing the same problem, need help with this.
for k=1:101
t=tk(k);
for i=3:4
x(k,i-2)=0;
for j=1:4
x(k,i-2)=x(k,i-2)+(real(S(j))*real(V(i,j))-imag(S(j))*imag(V(i,j)))*cos(imag(D(j,j))*t);
x(k,i-2)=x(k,i-2)+(imag(S(j))*real(V(i,j))-real(S(j))*imag(V(i,j)))*sin(imag(V(i,j))*t);
x(k,i-2)=x(k,i-2)*exp(-real(D(j,j))*t);
end
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