How to find a minimum value that calculated from a formulation?

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Le Dung
Le Dung 2017-2-26
评论： Le Dung 2017-2-26
Hi, Now, i have some parameters that range into a region. And i have a formulation that calculated form these parameters. (below code) And i want to find minimum value of the formulation that has to satisfy a condition. And i want to display that minimum value and coresponding values of parameters above. Help me, please. Thank you so much. My code:
x=(50:100);
y=(50:100);
z=(10:30);
Amin=Inf;
Apsmin=Inf;
Mu=155000;
imin=1;
jmin=1;
kmin=1;
for i=1:numel(x)
for j=1:numel(y)
for k=1:numel(z)
Mr = x(i)*y(j)*z(k);
A=x(i)*y(j)*z(k);
Aps=z(k)*1000;
if (Mr>=Mu)&&(A<=Amin)&&(Aps<=Apsmin)
Amin = A;
imin = i;
jmin = j;
kmin = k;
end
end
end
end
disp(Amin);
disp(x(imin));
disp(y(jmin));
disp(z(kmin));

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回答（1 个）

Image Analyst
Image Analyst 2017-2-26
编辑：Image Analyst 2017-2-26
"And i want to display that minimum value and coresponding values of parameters above." so you can use fprintf(), or sprintf() and helpdlg(), or both ways, like this:
message = sprintf('Amin = %f\nimin = %d, x(imin) = %f\njmin = %d, y(imin) = %f\nkmin = %d, z(imin) = %f\n', Amin, imin, x(imin), jmin, y(jmin), kmin, z(kmin));
% Display in command window:
fprintf('%s', message);
% Display vis popup message
uiwait(helpdlg(message));
  1 个评论
Le Dung
Le Dung 2017-2-26
Hi Image Analyst. But when i add a comand such as below: disp('We found value that we need') between two comand as below:
if (Mr>=Mu)&&(A<=Amin)&&(Aps<=Apsmin)
disp('We found value that we need')
Amin = A;
when program runs. It will present on destop " We found value that we need" for all cases. So, why?

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