Path: news.mathworks.com!not-for-mail From: <HIDDEN> Newsgroups: comp.soft-sys.matlab Subject: Re: 4th order moments matrix from covariance matrix Date: Thu, 2 Apr 2009 16:57:01 +0000 (UTC) Organization: The MathWorks, Inc. Lines: 7 Message-ID: <gr2qot$a9m$1@fred.mathworks.com> References: <gr2535$pmo$1@fred.mathworks.com> Reply-To: <HIDDEN> NNTP-Posting-Host: webapp-02-blr.mathworks.com Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 8bit X-Trace: fred.mathworks.com 1238691421 10550 172.30.248.37 (2 Apr 2009 16:57:01 GMT) X-Complaints-To: news@mathworks.com NNTP-Posting-Date: Thu, 2 Apr 2009 16:57:01 +0000 (UTC) X-Newsreader: MATLAB Central Newsreader 1697153 Xref: news.mathworks.com comp.soft-sys.matlab:529797 Thank your for your replies! I will study everything you told me. Let's forget the case of 6 variables and let's consider tha general case,where I have n variables and I compute the covariance matrix (n x n). Using the matlab funuction "size" I can find n. How can I compute the 4th-order-moments matrix now?Can someone write the matlab code according to the equation I gave you? The matrix should be 2-dimensional n^2 x n^2 because I have to multiply it with another matrix of the same dimensions. Thank you very much guys...