Matlab

Can I create variables without assigning them values in matlab?
Hi, I'd just like to create a matrix in matlab that contains variables but i don't want to assign them numerical values as I would like to manipulate the matrix and alter the variable values later. (I'm doing an admittance matrix of a circuit) I can't seem to get matlab to let me create a variable without assigning ... 6 May 2008 23:26

Find Magnitude and Phase of Sinusoidal signal
I am working with an eZdsp board and programming the board with Simulink. I would like to implement the following in Simulink. Currently, I am inputting three 60Hz sinusoidal waveforms (possibly with harmonics, but ideally these will be 60-Hz) to the ADC (these do not correspond to three-phase voltages from a ... 6 May 2008 22:22

How to find p and q in ARMA
Dear All, I just wonder how to find p and q in ARMA model in Matlab. please the replying..:) thanks you Hafez ... 6 May 2008 22:22

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

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