Matlab

limits in toeplitz()-function?
Hello there, i was going to generate some toeplitz-matrices with row-vectors as input (rVec): m=length(rVec)-1; zv=zeros(1,m); A=toeplitz([rVec' zv], [rVec(1) zv]); for solving the Problem Ax=b! When i use the topelitz()-function and rVec is larger then about 5000x1, matlab generates an error: %%%%%... 6 May 2008 22:22

Good way to binarize image?
I have a few hundred samples/images of characters that I would like to binarize. If I do: t = 100; img = img > t For most of the images the results are ok. But some of the images gets either totally black or white. Is there some good way to decide t for each image? ... 6 May 2008 23:26

medical image to array in mfile
Alok, maybe you don't understand what Walter means. Your F drive letter is mapped to some network location that we simply cannot see ... so how can anyone possibly help? What's your F: drive letter mapped to? !net use f: Cheers Bob ... 6 May 2008 22:22

Programmatically creating toolbar shortcut -
I too had the same file corruption problem. The problem is passing the empty matricies to the awtinvoke function. It seemed to me that the following syntax worked, and allowed a selectable icon. name = 'My New Shortcut' evalstr = 'disp(''My New Shortcut'')' iconfile = 'c:\path\to\icon.gif' isEditable = 'true... 6 May 2008 22:22

GINPUT and PAUSE bug
I don't see the problem you described. I gather it reproduces for you. You should contact MathWorks Technical Support. http://www.mathworks.com/support/contact_us/index.html Cheers Bob ... 6 May 2008 22:22

Is it error when use PCA to recognize trained face image. Why?
On May 6, 8:48 pm, "Bo Dai" <db...(a)163.com> wrote: Hi, All, I used the codes inhttp://www.cs.ait.ac.th/~mdaileyto make pca eigfaces. And the train images are att face database. [images,w,h]=load_images('AttFace.dat'); [Vecs,Vals,Psi] = pc_evectors(images,30); Proj = Vecs' * images;   Then ... 6 May 2008 22:22

mouse cursor coordinates
thanks for the email and concern. could you please tell me why i am unable to get values for variable outdd? in the following program. i can get and plot scroll wheel up/down movement with time let say but i am unable to get array values in the end. plz use hold on at command line after calling to the function... 6 May 2008 22:22

How do I create a 128*256 sparse matrix for LDPC?
Hi, there I am reading up some LDPC source codes in C I downloaded, I wanted to check it against Matlab, however the matrix doesn't work in Matlab, and fec.ldpcenc complains the following, "The last (N-K) columns of the parity-check matrix must be invertible in GF(2)." How do I modify the matrix? It's q... 6 May 2008 22:22

reading gif
"Robert Johansson" <robert.nospam(a)math.umu.se> wrote in message <fvl2ih$khs$1(a)fred.mathworks.com>... I have a picture in GIF-format which I need to process and convert to eps. Using "imread", MATLAB reads the file into a matrix with too few rows and columns. It seems that the information about the file ... 6 May 2008 22:22

Passing an array from c code to compiled matlab .m file
But if I need to pass an array of float values, i need to define argv as float* argv [100]; There will be an error. ... 6 May 2008 23:26