A problem with an iteration procedure

Hi everyone. I'm writing an iteration procedure that should calculate some values until the difference

X(i,j)-Y(i,j)<0.0001

where X and Y are 17by11 matrices. I have to compare each X(i,j) value with Y(i,j). I tried with a while loop with condition

 max(max(err))>=0.0001

(err=X-Y) but there are some elements that don't match to the condition.

Thanks for helping and sorry for my bad english.

[Azzi Abdelmalek]

Post your code.

Answer 1

[Azzi Abdelmalek]

er=X-Y
idx=find(er<0.0001,1)

Then write your iteration:

for k=1:idx
  %your code
end

[Azzi Abdelmalek]

%or maybe you want to compare

er=X-Y
if sum(abs(er))<0.0001

Answer 2

[Giacomo]

This is the last part of the code:

 nciclo=0;
 while max(max(abs(err1))) > 0.0001 | max(max(abs(err))) > 0.0001

 a=anew;  
 a1=a1new; 

 for i = 1:length(r) 
    for j=1:n+1

 fi(i,j)=(atan(x(i,j)+(((1-a(i,j)).*V(j))./((1+a1(i,j)).*omega.*r(i))))).*180./pi;

 w(i,j)=omega.*r(i).*(1+a1(i,j))./cosd(fi(i,j));
 alpha(i,j)=fi(i,j)-teta(i); 
 Re(i,j)=((ro/mu).*w(i,j))*chord(i);
 cl(i,j) = interp2(Reynolds,alfa,values,Re(i,j),alpha(i,j)); 
 cd(i,j) = interp2(Reynolds1,alfa1,values1,Re(i,j),alpha(i,j)); 
 CT(i,j)=(sigma(i)*((1-a(i,j)).^2).*(cl(i,j).*cosd(fi(i,j))+cd(i,j).*sind(fi(i,j))))/((sind(fi(i,j))).^2);

 if CT(i,j)<0.96
    anew(i,j)=1/(1+((4.*F(i,j).* ((sind(fi(i,j))).^2))/(sigma(i).*cl(i,j).*cosd(fi(i,j)))));
 else
    anew(i,j)=(1/F(i,j)).*(0.143+sqrt(0.0203-0.6427.*(0.889-CT(i,j))));
end

 a1new(i,j)=1./(((4.*F(i,j).*(cosd(fi(i,j)))./(sigma(i).*cl(i,j))))-1);
 err1=(a1new-a1);
 err=(anew-a);  
 nciclo=nciclo+1;

    end
 end
 end