Matlab realization of algorithm

% water pouting algorithm
Mt=2;
Mr=2;
SNR=2;
P=1; %iteration count
negative=0;
samples=10;
for i=1:1:samples;
  Hw(:,:,i) = (randn(2,2)+1i*randn(2,2))/sqrt(2);
end
sigma_N_square=10^(-(SNR/10));
RANK=rank(Hw(:,:,1));
sum_lambda=0;
for r=1:1:RANK;
  lambda(:,1) = eig(Hw(:,:,1)*Hw(:,:,1)');
  sum_lambda = sum_lambda+1/lambda(r,1);
end
Mu = 1/(RANK-(P-1)) * ( Mt + Mt*sigma_N_square/(P*sum_lambda) );
if
  for j=1:1:(RANK-(P-1)); % checking non-negative Gammas
    Gamma(:,j) = Mu - Mt * sigma_N_square/ (P * lambda(j,1) );
  end

Question - How do I realize during all algorithm checking the elements of the Gamma matrix (are they positive if no go back in the beginning of algorithm and increase P=P+1 and find elements of Gamma again and so on. My goal is to get all Gammas being positive)

[Image Analyst]

I'll do it for you this time, but for the future, learn how to format your code here: http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup

Your "if" statement at the end does not have a condition, or an end statement, so that won't work.

[Ruslan Kashirov]

OK Sorry it's my first time!

Answer 1

[Walter Roberson]

if all(Gamma(:)>0)
   %they are all positive
end

[Ruslan Kashirov]

Thank you!

But how can i return to beginning of the algorithm after the checking the elements of Gamma? Is there any analogue of the command "goto" in Matlab?

[Walter Roberson]

http://www.mathworks.com/matlabcentral/fileexchange/26949-matlab-goto-statement

However, the recommended method would be instead to use

while true
  ... do something
  if all(Gamma(:)>0)
    break;   %we succeeded, we can leave the loop!
  end
end