Date: Nov 26, 2012 7:52 AM Author: flying Subject: How to deal with complex nonlinear least square problem? Hi all,

I have ecountered a problem recently.It's something about 'complex nonlinear least square'. For instance,we want to minimize object function

y = min|3+4i - x^2|^2 ,where i = sqrt(-1),x is a variable

How can i get 'x' by using matlab function 'lsqnonlin'?

If there are more variables,how can i figure this out?

Anticipating your reply,thanks!

Sincerely

Frank