Save value from overwriting in while loop
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In this while loop I want to save u(end) and u1(end) in a vector but when i Try to do it it becomes problematic. Firslty I know how to do it if it only would been one variable (u), but in m case it is u1 too. For every iteration u1 and u ( last element of those ) gets overwritten so I dont know how to save u and u1 ( last elements) in a vector.
2 Comments
Ameer Hamza
on 8 May 2020
Mohammed Hassan, This forum is for public benefit. Deleting the code in question makes the question meaningless for anyone else. I am restoring the code so that anyone else coming to this form can have a better idea about the original question.
Ameer Hamza
on 8 May 2020
Text of original Question:
hI
En=50
While d >tollerance
[g u] = main(En,k)
En=En*3;
[g u1] = main(En,k)
d=abs((u(En/3)+1)-u1(En+1));
end
In this while loop I want to save u(end) and u1(end) in a vector but when i Try to do it it becomes problematic. Firslty I know how to do it if it only would been one variable (u), but in m case it is u1 too. For every iteration u1 and u ( last element of those ) gets overwritten so I dont know how to save u and u1 ( last elements) in a vector.
Answers (1)
Ameer Hamza
on 7 May 2020
Edited: Ameer Hamza
on 7 May 2020
The most simplest way is to let the array grow dynamically
En=50
u = [];
u1 = [];
while d >tollerance
[g u(end+1)] = main(En,k)
En=En*3;
[g u1(end+1)] = main(En,k)
d=abs((u(En/3)+1)-u1(En+1));
end
For an efficient solution. See this FEX submission from John: https://www.mathworks.com/matlabcentral/answers/510713-is-it-possible-to-store-the-intermediate-values-of-fmincon
13 Comments
Ameer Hamza
on 7 May 2020
'temp1(end)' means that the last element of the vector temp1. Since you mentioned that main() returns a vector, and you want to keep the last value of that vector. The 'temp1(end)' keeps that last value.
u(end+1) tells the MATLAB to extend the array 'u' and add the new element to the extended location. This makes sure that the last value is not overwritten.
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