Matlab

Locking assertion failure.
"Matteo " <voto_100.delete.this(a)hotmail.com> wrote in message <g3bh07$m0j$1(a)fred.mathworks.com>... "Jeff " <wweagleflyer(a)yahoo.com> wrote in message <fuuf7k$t72$1(a)fred.mathworks.com>... I have the same problem. Another forum: https://bugs.launchpad.net/xorg-server/+bug/185311 gave seve... 18 Sep 2008 11:17

AWT-EventQueue-0
Hello all, MATLAB 7.0.4 + Windows Server 2003 Enterprise Edition. I converted my M code to standalone version. When I run my standalone application, the Matlab reports the following error messages: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at sun.awt.Win32GraphicsEnviron... 17 Sep 2008 13:28

bintprog with big data
Is there a way to use a sparse matrix as A (rule coefficient matrix) in bintprog? It complains that the inputs should be double (they are, A is just sparse). It is utterly impossible to use a dense matrix as A, because I have less than a terabyte of memory in my machine :) ... 6 Sep 2008 16:17

Multidimensional Sparse Matrices
Is there a way to construct an N-dimensional sparse matrix? I have rather large 4 dimensional matrices that could use some sparse-ifying. I tried using a cell array of 2D sparse matrices, but it doesn't handle the same. I'm adding these guys, summing along rows and columns, and doing element by element divides... 4 Sep 2008 17:07

Mahalanobis Distance Calculation
Hi, I'm trying to understand how mahal function in MATLAB works. I see that the method used is different than the MD calculations in the literature. How is QR decomposition used here? Any help (maybe references, links etc.) will be appreciated. Thanks, Baris Yenidunya ... 17 Sep 2008 16:33

colfilt associated function return
Hi all. I've been using colfilt for a while with custom functions. It's pitty one cannot give pass an extra argument to the function handle used with colfilt, but I learned to work around it. However, I am quite often irritated by what the function should return, as colfilt often bails out when trying to reshape... 29 Aug 2008 09:35

Equivalent of fftshift for Radon Transform
Hi all, I have been trying to figure out what is the equivalent of fftshift for the Radon Transform output in image processing. I used the usual radon() in MATLAB and then wrote code for flipping the first quadrant of the image with the third quadrant and second with the fourth one. Is this correct? Is there any... 26 Aug 2008 20:13

cox proportional hazards model
Hi there, I just learned to use coxphfit and studying a bit about the cox model. I cannot understand why in the cox model there is no intercept? And why couldn't we model the hazard ratio as linear function of the covariates?Any help from anyone? Thanks in advance! ... 21 Aug 2008 14:30

using inline and ODE45
I'm not a frequent MATLAB programmer so I appreciate the assistance with what I expect is a simple question for many of you out there. I need to solve the ODE below: dx/dt = ka * (A - x) * (B - x) - kd (C - x) I tried to use f = inline('ka * (A - x) * (B - x) - kd (C - x)') and then subs(f) to... 18 Aug 2008 12:35

MATLAB ERROR MathWorks::System::SimpleException
Hi, I'm using UNIX system . My FORTRAN program calls MATLAB to use on of the inbuilt function "pwelch". For some problems i get following error : ************************************************************************************* terminate called after throwing an instance of 'MathWorks::System::SimpleExcep... 16 Aug 2008 23:49