Matlab

C++ mex file segmentation fault
Hello , I am working on mex files as i want to store the results of matlab simulations to a database. the databse i already defined .The C++ program is working fine and correct , but when i try to write the mex file in matlab ..it compiles andlinks properly but at the end of the program it crashes saying segmen... 30 Jun 2010 04:20

Listener to HG callback
Hi All, I want to add a listener to an event that will fired every time the user use the GUI. I tried to listen to the root (0) property called "CallbackObject" with no luck (nothing happened). addlistener(0,'CallbackObject','PostSet',@mycallbak) Any suggestions? Tx, Lior ... 28 Jun 2010 07:19

why use sparse matrices in matlab?
i ahave a doubt. why use sparse matrices in matlab. i think when we find sparse of a matrix some data is lost . can we do it reverse? is there any function to desparse?. is sparse matrices used only denote the nodes of graphs like that? kindly reply ... 28 Jun 2010 09:29

Opening a Image in MatLAB GUI
If I open a Image in MatLAB GUI say for example the resolution is (2000 x 1500) it fit to the axes correctly Then after If I open another Image which has a different resolution (500 x 600), it doesn't fit to the axes and it uses the previous one(2000 x 1500) and display the (500 x 600) Image. So the difference is lef... 28 Jun 2010 12:49

Need to Crop Sqaure Images
I have 6000 images of cats. I need 6000 images of the cat heads such that they are square images, e.g. 120 x 120 pixels. The cat images are versatile and so I cannot simply write an algorithm that crops it to HxH if H<W or then WxW if W<H, where W and H are width and height, respectively. Does anyone have any sugges... 28 Jun 2010 03:01

Array functions using MATLAB
If i have an array (say 2 by 2 or 2 by 6 etc) how do i check if each of the elements are real or complex. I am looking for something which checks each element of the array and returns the array as it is if all elements are real and if any element is complex, it just picks up the real part and rejects the imaginary part... 28 Jun 2010 03:01

Right click menu, Picture
I would like to edit the Right click menu in the Image (which is loaded in axes in MatLAB GUI.) Is it possible? Especially I would like to write my own function for "Reset to original view" right click option. Thank you, Best Regards, Paheerathan ... 28 Jun 2010 03:01

system identification with non-synchronized signals
hello, There is a problem for me when doing a system identification. it is a MIMO system. But the measured inputs and outputs were not well synchronized... And the dimension of the data are not the same. Is it possible to deal with this kind of data with the system identification toolbox? Thanks ... 27 Jun 2010 23:46

graph allshortest paths
Virtualized <razzaqadil(a)gmail.com> wrote in message <29f004d7-b793-4e35-94b2-634300eb1950(a)j28g2000vbl.googlegroups.com>... On Oct 8, 3:51 pm, "Steven Lord" <sl...(a)mathworks.com> wrote: "Virtualized" <razzaqa...(a)gmail.com> wrote in message news:a96f09b1-3233-46e8-a21a-01760db908e8(a)v2g2000vbb.googlegrou... 27 Jun 2010 23:46

matrix multiplication
Hi all, Could someone please give me a hand for this simple question? I want to multiply colum by colum of the two matrices. For example: matrix X has the size (4,3) and matrix Y has the size (1,3). Is there any single Matlab command to produce a matrix Z in the following format: Z = [X(:,1)*Y(1) X(:,2)*Y(2... 28 Jun 2010 10:35