Matlab

mldivide for sparse matrix runs out of memory
Hi everybody, I've read almost all threads here on sparse matrices, lu, qr and so on and it really helped me move forward with my problem. Everyone says, that if you have to solve something like A*x=b, use the backslash operator. Unfortunately, this results in an out of memory error for my matrices. A has full r... 26 Feb 2010 11:54

problems with pardiso interface
Hi, I've just installed the pardiso interface in matlab. The example works fine, but when I try to solve the system that I want, it gives the wrong result. However, solving the transposed system works fine! What I do is the following: to solve sisten A*X=B, i do info = pardisoinit(11,0); info = pardisoreorder... 25 Feb 2010 11:23

problems with pardiso interface
Hi, I've just installed the pardiso interface in matlab. The example works fine, but when I try to solve the system that I want, it gives the wrong result. However, solving the transposed system works fine! What I do is the following: to solve sisten A*X=B, i do info = pardisoinit(11,0); info = pardisoreorder... 25 Feb 2010 11:23

drawin rectangles on a videostream taken from a camera
Hi everyone I am trying to do object tracking on a live video stream taken from a camera. I want the user to select the target in the frame by clicking the mouse on it.This creates a fixed rectangle around the click point. however if user wants to change target and clicks again somewhere on the video stream, I need t... 3 Mar 2010 08:25

frequency permutation
Hi, Is there anybody could help me with this problem? I am working with source separation in frequency domain.What I'm doing is, I first transform the time domain mixtures into frequency domain using the STFT.Then do the separation. When I take inverse STFT, there must be permutation effect to the output. Therefor... 25 Feb 2010 10:15

Speed up Matlab plotting
Hi i have a gui that has 2 axe. My code plots the imagesc of a matrix in the first and a surf of a matrix in the second. My code runs imo slow is there anything i can do to speed it up? axes(handles.axes1) imagesc(x) axes(handles.axes2) surf(x) i have noticed the m lit messages saying " calling axes(h... 25 Feb 2010 10:15

Plotting methods
Hi all, Anyone can suggest was sort of plotting I need to use, to simply show addition of vectors, so starting from (0,0) and the vectors are added, for instance v1 = 1(angle0), v2 = 3(angle 12) etc... but as a plot so each tip of the vector should be attached to the end of the next vector. ( is this possible to be ... 25 Feb 2010 09:08

Area of intersection between triangle and circle
Hi, I am searching on how to calculate the area of intersection between a triangle and a circle. the case below for triangle with tip outside, but my case the tip of the triangle is inside the circle. XXXX X X X +----X--- Triangle X | X ... 25 Feb 2010 09:08

Insturment Control Toolbox error
Hello, I have just installed the Instrument control toolbox (it is now listed in my license details, when I use the command 'ver', and the m-files are in my toolbox folder), but I get the error eg "??? Undefined function or variable 'instrhwinfo'." whenever I attempt to use any of the functions. I have added the relav... 4 Mar 2010 13:29

Why I can't get a vector from raylfit?
I'M trying to get a rayl distribution parameter vector for each section of my divided data.Say, there is my data a column vector A contains 1000 samples, and i treat every 5 samples as a Rayleigh distribution and loonking for a rolling parameter vector, what i write in the command is : for x1= 1: 1000 belta(x1) = ... 25 Feb 2010 12:31