Matlab

Simulating white noise
Hello to all, is there any MATLAB function which can simulate white noise. I'm reading one theory book in which there is example where signal containes additive white noise. I 'm not sure how to model that in Matlab. Any advices? ... 6 May 2008 23:26

Mex file crashes on second run
Hello, I'm in the process of writing a MEX-file, and I've finally got it working, but I'm having an odd problem. The function runs perfectly well if I run it once, but if I attempt to run it a second time, MATLAB crashes, which seems to be an indication that the FORTRAN subroutine I'm using for the MEX gateway ... 6 May 2008 23:26

Compiled M-File Behaves Differently
Using R14SP3 (7.1), I found when compile a m-file which plots a figure that most of the toolbar functionality has dissappeared. Dropdown for "Edit", "View", "Insert", "Tools", "Desktop", "Window" and "Help" are no longer assessable. Only "File" remains. Also the "Edit Plot" button is gone. Any thoughts... 7 May 2008 00:21

coxphfit in Statistics toolbox
"Tom Lane" <tlane(a)mathworks.com> wrote in message <fvfjlp$9jp$1(a)fred.mathworks.com>... Since the source code is not accessible for this function, can you provide more specific reference on the algorithm used? I know two books are listed in the Matlab documents, is there a particular chapter ... 6 May 2008 22:22

transform arbitrary 3-D scattered points into a sphere of points
I realize this isn't a technical question per se, but I think that some of you may have some insight into this type of problem. I have a set of x,y,z arbitrarily scattered points/particles that I would like to collapse into a sphere containing the same number of particles, all are on the same 3-D grid with no ov... 6 May 2008 23:26

Minimize a GUI
"Henrique Amaral" <henriquetomaz(a)uol.com.br> wrote in message <fvqe0p$sfe$1(a)fred.mathworks.com>... What comand I have to use in the code for mimize a window GUI when I execute this GUI (press OK for exemple). I would like that minimize the GUI than see the MatLab Command Window. Thanks. ... 6 May 2008 22:22

need explanation: something that works with \ operator doesnt work with lsqnonlin function
Hi, I have a LINEAR problem that I can solve using \ (slash) operator. I need to solve a NON_LINEAR version of this problem. For this I suppose I should use LSQNONLIN. I tried to use it and it doesn't work. I then tried for debug to plug into LSQNONLIN my linear problem and it doesnot work as well. Do... 6 May 2008 22:22

what is better to use: fmincon OR lsqnonlin
Hi, My objective function is to minimize the L2 norm of some vector + I have a linear constraint on the variables. So the output of the objfun: 1) in case of using lsqnonlin: F = [ f_1 ; f_2 ; .... ; f_n ; A* f - b] 2) and in case of fmincon the output is: sum ( f_i.^2 ) with the constraint A... 6 May 2008 23:26

Object Oriented Changes in 2008a
Can anyone point me to a list of the specific changes between 2007b and 2008a with regard to support for object oriented code? I written some MATLAB code using 2008a that takes advantage of the latest object oriented features and I just discovered it also need to run in 2007b and I'm see initial errors cal... 6 May 2008 23:26

Temperature and pressure model of optical spectra
Hello, I'm working on a project to autocalibrate my optical spectra based on temperature and pressure. I have a full designed experiment dataset for temp and press on my system and can generate PLS regression models from these spectra. I have even been able to generate PLS2 prediction models for these data tha... 6 May 2008 22:22