How to Perform iteration with conditions? Help Please!!

I have the following arrays with which i need to work with, been working on this the whole day and haven't got anything out of it. Help would greatly be appreciated. Thanks.

I have these two variables in the attached excel file. Wgt, LgRet

%%Step 1 - Find the Beta using the Wgt and LgRet

Port_ret = LgRet*Wgt;
Beta = zeros(1,N);

for w = 1:N
  Beta(w) = regress(LgRet(:,w),Port_ret);            
end

%%Step 2 Check the property LHS == RHS
 LHS = Beta.*Wgt';
 RHS = (1/N)*ones(1,N); 

% if LHS == RHS then the Wgt satisfies the property, if not perform iteration, by increasing the Wgt if LHS < RHS and decrease Wgt if LHS > RHS, and use the new Wgt to find Beta by repeating Step 1 until the equality LHS == RHS is obtained.

--------------------------------------------------------------------

    % Here
        % N     is  scalar 
        % Wgt           is  N-by-1 vector
        % LgRet   is   M-by-N matrix
        % Port_ret   is   M-by-1 vector
        % Beta           is   1-by-N vector
        % LHS    is  1-by-N vector
        % RHS    is   1-by-N vector

      %  However to get the correct Wgt, 
      %  the condition LHS == RHS must satisfy. 

      %  The problem needs to 
      %  Increase Wgt if  Beta.*Wgt' < RHS
      %  Decrease Wgt if  Beta.*Wgt' > RHS

      %  And then perform *Setp 1* again, do this iteration until LHS == RHS
      %  *Note that sum of Wgt at all time must equal 1*
      %  in this exercise i use N as 100
      %  M as 1051