You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: runicalowmem.m
    path of file: ./repos/eeglab/functions/miscfunc
    
    the code of the file until where you have to start completion: % RUNICA - Perform Independent Component Analysis (ICA) decomposition
%            of input data using the logistic infomax ICA algorithm of 
%            Bell & Sejnowski (1995) with the natural gradient feature 
%            of Amari, Cichocki
    
function 'specgram'; improve
%           'specgram' option arguments -sm
%  01-25-02 reformated help & license -ad 
%  01-25-02 lowered default lrate and block -ad 
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

function [weights,sphere,meanvar,bias,signs,lrates,data,y] = runica(data,varargin) % NB: Now optionally returns activations as variable 'data' -sm 7/05

if nargin < 1
  help runica  
  return
end