Matlab

how to download haiti seismic record ?
is therer someone know how to download haiti seismic record in ECEER ? thanks! ... 25 Feb 2010 22:42

Root guess values for Newton's Raphon method
Hello to all, I'm trying to solve a system of non-linear equations using the Newton's Raphson method. I've created a function which finds the zeros of continuously differentiable function with the use of Jacobian matrices. However, sometimes my initial guess x0 may not be close enough to the true root so the iterati... 25 Feb 2010 21:36

colorbar question
I'm trying to display colored dots on a background map, where the color of each dot represents the temperature at that site. I then want to display a colorbar to the right of the map that shows the color-coded temperature scale shown by the dots. Problem is that the colorbar is linked the colormap used to display the... 25 Feb 2010 23:48

working with logicals
Let say I have two logicals: r1 = [0 1 1] and r2 where r2{1} =[0 0 0 0] r2{2}=[1 1] r2{3}=[1 0 0 0 0 1] Let's say I have cell array a where a{1}=1:4; a{2}=[10,5]; a{3}=[9,1:4,8]; I would like now to use r1 and r2 to do extract elements from a where r1 and r2 are non_zero. so I would have b = [ 1... 25 Feb 2010 20:29

Transfer function matrix using symbolic math toolbox
Hi, Is there a way to simplify the zeros and poles of a transfer function matrix, when the laplace s term is represented using symbolic math toolbox. Because of the numerical error, matlab does not simplify the transfer function matrix. Or is there a way that I'm unaware of? Many thanks ... 26 Feb 2010 18:40

how to put untrusted functions in a sandbox
This is a teaching related question: I want to test automatically Matlab functions written by students using a Matlab script. I can easily catch errors with try/catch but how can I prevent from exexcution malicious code such as system calls or access to caller workspace inside the tested function? I have not found ... 1 Mar 2010 15:16

sagittal slice from a txt file
"Nico zanette" <zannakill(a)hotmail.com> wrote in message <gmrnuu$hdo$1(a)fred.mathworks.com>... Hello I'm in trouble, I need to obtain a MR image from a txt file. The file contains a single column of data, with each row representing a different voxel in the grid. The data file was generated using the following o... 25 Feb 2010 18:14

Image acquisition Toolbox, Problem
Hello, I got image acquisition toolbox. Whenever I try to open it, toolbox starts to load something, and loading does not end, I am able to use regular matlab, but not the toolbox. on the screen, there are window for device browser and just next to it, there is a warning in a frame which says select a device format, wh... 25 Feb 2010 17:05

Matlab image processing gui help....
i have some problem in matlab gui...i have a gui program that consists 3 pushbutton...the first one is to start the webcam...2nd one to snapshot the preview and imshow it in RGB...and the 3rd one to imshow the snapshot picture in edge detection mode.....the problem is for the 3rd button it does not update the snapshot ... 25 Feb 2010 15:57

Elements between 2 index vectors
Hi I have a vector v=1:20; and two index vectors i1=[3 6 11 15]; i2=[5 9 12 19]; I am trying to find the elements between i1(k) and i2(k), k=1:4. The results should be [4 7 8 16 17 18]. Could you please help me do it without loops? Thanks, Tom ... 26 Feb 2010 00:53