how can I avoid this error: Error using eig EIG did not converge.

I want to find eigenvalu and eigenvector using "eig" function in matlab, but sometimes I get this error:

Error using eig EIG did not converge.

how can I avoid this error or what can I do the code run again automatically if this error happens?

Answer 1

[Jan]

Are you looking for TRY/CATCH?

[mim]

what's that? and how it can help me?

[Jan]

You explained, that your code fails sometimes. Then including the failing command in TRY/CATCH allows to run a fallback method or some error handling:

try
  [V, D] = eig(X);
catch ME
  warning(ME.message);
  [V,D] = EIG(X, 'nobalance');  % For example
end

It depends on your calculations, if the problem can be avoided or what "automatic" can help get the wanted result. Without knowing any details about your code, I can suggest only a general strategy.

Answer 2

[Marco Gambacciani]

look at this: http://ask.cvxr.com/t/eig-did-not-converge-in-prox-trace/996/20