# A confused problem

I have encountered a confused problem
when I run a CVX project ,the ‘Status’ shows that the project is ‘solved’(not ‘Inaccurate/Solved’).But when I test the results in the matlab prompt, the results DO NOT satisfy the constraints between the ‘cvx_begin’ and ‘cvx_end’,both the inequality constraints and the equality constraints.
I am going crazy now,hope you can help me .Thank you very much for your attention.

Hi,
I guess you have mistaken in writing your code. It’s better you check it more. If you don’t think please make a copy of your coded or selected part so that we can see it.

Best

When I add the constraint below to the program between ‘cvx_begin’ and ‘cvx_end’, it always turn out
wrong,the wrong I metioned in the above.

``````for i=1:2
for j=1:2
for m=1:2
if m==i
temp4(1+2*(m-1))=h(:,(2*(i-1)+j),1)'*W(:,1,m);
temp4(2+2*(m-1))=h(:,(2*(i-1)+j),1)'*W(:,2,m);
else
temp4(1+2*(m-1))=h(:,(2*(i-1)+j),2)'*W(:,1,m);
temp4(2+2*(m-1))=h(:,(2*(i-1)+j),2)'*W(:,2,m);
end
end
for m=1:2
if m==i
temp4(5+4*(m-1))=h(1,(2*(i-1)+j),1)*t(m,1);
temp4(6+4*(m-1))=h(2,(2*(i-1)+j),1)*t(m,2);
temp4(8+4*(m-1))=h(4,(2*(i-1)+j),1)*t(m,4);
else
temp4(5+4*(m-1))=h(1,(2*(i-1)+j),2)*t(m,1);
temp4(6+4*(m-1))=h(2,(2*(i-1)+j),2)*t(m,2);
temp4(7+4*(m-1))=h(3,(2*(i-1)+j),2)*t(m,3);
temp4(8+4*(m-1))=h(4,(2*(i-1)+j),2)*t(m,4);
end
end
temp4(13)=r(i,j);
temp4(14)=sigma;
norm(temp4)<=(sqrt(1+(1/(2^gama(i,j)-1))))*(real(h(:,(2*(i-1)+j),1)'*W(:,j,i)));
end
``````

end

``Blockquote``

Remember, CVX relies on numerical solvers. Small deviations from feasibility are to be expected, and must be taken into account by the following code. Larger errors may be a sign of a modeling problem, or perhaps a bug in CVX.

Maybe I made some mistakes, but when the CVX show the status is “solved”, the result must ,at least, fulfilled the constraints between the ‘cvx_begin’ and ‘cvx_end’, because CVX calculates the result due to these constraints.Unfortunately, it does not fulfulled the constraints.

Can anyone who wants to help me leave an email address here? So I can send my program to you. My karma value is too low to upload an attachment.

If I set a constraint between cvx_begen and cvx_end, like ‘A<=B’, and the status is solved,but the result show that A is 5 times more than B, this is wierd.

I have deleted your duplicate post. If anyone in the CVX community here is able to spend some time debugging this issue, please contact the poster at weilingsly@gmail.com