Matlab

Changing value of heaviside for 0
Hi, I need a function for operating in symbolic like heaviside but with value of 1 for heaviside(0) and not 0.5. How to change the value of heaviside(0)? If i can't, is there a way to write a function for symbolic use like heaviside? Thx for your help. ... 25 Jun 2010 19:46

sparse matrix
how can I store a matrix having short integers as sparse matrix. I used following code but it did not work- b=zeros(10,10); b(2,:)=[1,2,3,4,5,6,7,8,9,10]; c=uint16(b); d=sparse(c); Please somebody help me. I need to store a very big matrix. Thanks, Amit ... 26 Jun 2010 08:39

Backup - software
I recently bought a Western Digital My Passport external drive to use as a backup for my work. It comes with WD SmartWare Software, which automatically backs up files whilst they are being worked on. I think I have it set so that it stores the last 5 versions of a file and works in the background in real-time. Gre... 29 Jun 2010 14:04

Convert C image to mxArray
Hello I am trying to convert a C image to mxArray. I am able to retrieve the pixels of the image and I can create the proper size mxArray. What is the correct way to assign the values? mwSize dims[] = {image.Height,image.Width,3}; mxCreateNumericArray(3,dims,mxUINT8_CLASS,mxREAL); for(int i=0;i<image.Height;i... 25 Jun 2010 17:34

MATLAB code and Binary Image database
I would like to inform you that I need a MATLAB source code to recognize different regular geometric shapes such as: squares,rectangles,triangles,circles and ellipses in different sizes using neural network. All of the images containing these shapes should be in binary format with the size of 300*400 pixels. Would y... 25 Jun 2010 17:34

MATLAB code and Binary Image database
I would like to inform you that I need a MATLAB source code to recognize different regular geometric shapes such as: squares,rectangles,triangles,circles and ellipses in different sizes using neural network. All of the images containing these shapes should be in binary format with the size of 300*400 pixels. Would y... 27 Jun 2010 23:46

peak thresholding
hi i have a power spectrum of an image were its a sharp big peak with sidelobes .... how can filter the long peak and keep only the sidelobes ? ... 26 Jun 2010 10:48

FCOR Algorithm
Hi All, Does someone have any code that implement FCOR algorithm ? My goal is to calculate Harris Index. Thanks in advance, Laércio ... 25 Jun 2010 17:34

load large matrix and calculate eigenvals
Hi, I have a large matrix 30,000x30,000 stored in text file(~10G in size), and I want to find the eigenvalue and eigenvector for it and print it to another text file. I am wondering how can I do it using parallel computing package( or else I get "Out of Memory" error and I am doing the computation on a cluster) ... 27 Jun 2010 23:46

load large matrix and calculate eigenvals
Hi, I have a large dense matrix 30,000x30,000 stored in a text file(~ 10 G in size), and I want to load it into memory. After finding out all the eigenvalues and eigenvectors using eig, I want to print the eigenvalue and eigenvector to another text file. Since the memory is limited for a single core, I want to ... 25 Jun 2010 16:28