Matlab

video capture
dear friends, I have to capture video using a web camera continuously and processes the frames without saving the video.Is it possible?is there any online resource available? Thanking you Raj ... 28 Jul 2010 00:58

rescaling for fmincon
"Samuel Edwards" <DJeter1234(a)AOL.com> wrote in message <i2no52$3oi$1(a)fred.mathworks.com>... Doesn't fmincon approximate the Hessian automatically? How would I approximate it better? I do not have the actual gradient to the problem, and it is impossible to solve analytically. ================== If your proble... 27 Jul 2010 22:48

Using the horizontal zoom cursor for non-zooming action
I'd like to use the horizontal zoom cursor to select a data range in a graph without actually zooming. Anyone have a clue how I might do this? In addition, if I could do it without the initial zoom cursor (mag glass) that'd be greatly preferred. Thanks! ... 28 Jul 2010 07:26

Matrix return values
Hello guys, I'd like some help, If I have a matrix A: A = [ 0 0 0 0 0; 0 0 0 0 2; 0 2 0 0 0; 0 0 0 0 0 ] now, the number 2 starts at column 2 and ends at column 5 also, the number 2 starts at row 2 and ends at row 3... 27 Jul 2010 21:42

Matrix return values
Hello guys, I'd like some help, If I have a matrix A: A = [ 0 0 0 0 0; 0 0 0 0 2; 0 2 0 0 0; 0 0 0 0 0 ] now, the number 2 starts at column 2 and ends at column 5 also, the number 2 starts at row 2 and ends at row 3... 28 Jul 2010 04:12

Convert 3D slice in matrix
Hello everyone, I am currently working on 3D images (MSCT scans) in Matlab and I used the slice function to observe specific slices of my 3D data from different angles (specifically I used this tutorial: http://www.mathworks.com/access/helpdesk/help/techdoc/visualize/f5-3558.html). My question is once I am observ... 27 Jul 2010 20:35

rounding from iteration??
Hi everybody, I am so confused by MATLAB's rounding. I am trying to build a matrix with units that I am familiar with (Hz).. That's the reason why I didn't stick with integer indexing in the beginning (i.e. i=1,2,3..). I simplified my problem down below in 2 cases and both looks to round so that I am not able to ... 28 Jul 2010 03:07

How to move a point on a map
Hi, I am writing an algorithm for indoor Positioning/localization , I want to make GUI with this algorithm that shows the position of object by some point as the object moves from one location to another on floorplan (map). Can anyone plz tell me how to do it. thanks ravi ... 27 Jul 2010 20:35

Recording animation in *.avi format !
Hi there, You will have to use the MATLAB API to do this. For the demo here: http://www.mathworks.com/matlabcentral/fileexchange/28089 which is essentially the same MATLAB code except for the WRL file, you need to add the following piece of code just after the vrfigure command: set(fig, 'Headlight', 'off');... 27 Jul 2010 19:29

Easy array question
I have an MxN array of imported values and have a certain cutoff threshold. What's the best way to change all the values below that threshold in the array to 1? I was thinking of using an 'if' loop but it won't seem to work. I need to keep the size of the array the same. Any help would be appreciated, David ... 27 Jul 2010 20:35