Matlab

Delaying a signal
Hello, i am working in matlab with a matrix containing different values of a signal and i need to delay it to implement a demodulator. I(1:length(I)-1) I want to know if this formula will be correct ... 28 Jun 2010 13:55

Clustering Binary data
I have a medium-large (500K rows * 50 columns) matrix of binary data (0-1 entries only). The matrix is mostly sparse: about 8% is filled. I would like to cluster it robustly - as in if I run the clustering again, I should get mostly the same result each time. (Obviously the cluster id lables themselves can differ e... 28 Jun 2010 12:49

matlab in windows 7
Sir, I can not able to install Matlab 2009 in windows 7. After installing 26%, installing file dissapear. Also I changed to windows classics it does not work. kindly suggest so that I can load it ... 28 Jun 2010 13:55

point projection on a surface mesh
Hi, I was wondering if anyone know if there's an efficient way of finding the point projection onto a given 3D surface mesh. The projection point can either be within a surface patch, or on the edge, or be the closest node relative to the given point, depending on where the point is relative to the mesh. The mesh it... 28 Jun 2010 12:49

Reading Excel Data into a list box
Hello all, I cannot figure out how to read data from an Excel sheet into a listbox. The only thing I can find is the 'List Box Tutorial - lbox.m' on the MathWorks website, which works with directories. I'm working with data sets of pharmaceutical components that contain multiple columns of data for each. I can extr... 28 Jun 2010 12:49

function trapz
Hi all, I want to calculate area under the curve and I figured out that trapz is the function I need. However I got strange results with it. So I have a curve (looks like a bandpass filter) y [y1,y2,..yn] for given values x [x1..xn]. to get more data points I use interp1 and depending on that how many new points I ge... 28 Jun 2010 16:09

Regression with mutually exclusive variables
Hi! I am trying to run a regression to explain the price of certain objects. I have identified about 30 variables that might be significant, but the problem is that some of them are mutually exclusive. Example: some of the objects are flat, so their size is in square inches, some are 3 dimensional, so it's in cub... 29 Jun 2010 14:04

significance tests of power spectra
chronux can do it, but matlab can't so far as i can tell. chronux does NOT adaptively weight the taper coefficients though, like pmtm() does, so there is more spectral leakage. sure would be nice if the mathworks put the F-test into pmtm. that's the HUGE advantage of the multitaper approach. Does somebody hav... 28 Jun 2010 11:42

Cylindricity Error code
Hi, I was wondering if the code for finding cylindricity error (form tolerance). either by minimum zone method or least square method is available, for direct application. Thanks ... 28 Jun 2010 11:42

Call for volunteers: GlobalText Image Processing Book
Hi Matlab users, I have offered to head up a book called "A Practical Introduction to Image Processing" for the GlobalText project http://globaltext.terry.uga.edu/ . Their mission is to have people write "open access" text books and then freely distribute them throughout the world. The project leaders thought an ima... 28 Jun 2010 12:49