Matlab

help me to find the root of the equation
Hi everyone, I would be grateful if you could help me with this basic question as I am very new to MATLAB. I need to find all the roots of some equation in the interval [o, pi], so I wrote the code below and it does work fine and give the right result, but the problem is that I need to find all the roots in the i... 22 Jul 2010 18:00

Passing Arguments with registerevent
I'm attempting to embed an explorer window into a figure, which is pretty simple. But I'm also attempting to perform certain tasks with callbacks from the activex object. My question is how do I pass a variable into the callback that is set with the function registerevent? handles; %This is the variable I want to ... 22 Jul 2010 16:54

movie2avi question
Hello, When I play an .avi file that I have converted with the move2avi command, the initial screen is blank until I hit play... the movie then plays with no trouble, and then the screen goes blank again when it finishes. What I am looking for is this: When I load the file in the player, the first movie frame appe... 23 Jul 2010 13:37

link 3D axes view angles
I've built a GUI, with two surf plots, one showing the data, and another for physical reference. I'm trying to find a way to get the 2nd axes' "View" property to always change to the "View" property of the first. (preferably while the user is changing the first, not after.) %I tried using the "WindowButtonUp... 22 Jul 2010 16:54

Matching elements in two different sized matrices?
Hi, Hopefully someone can help me with this. I have two matrices, A is 8000 x 1 and B is 1000 x 2., all elements are numeric. A is a column vector of serial dates (six-digit integers) in random order The first column of B is a range of serial dates that covers all the dates in A. The dates are in sequentia... 22 Jul 2010 16:54

Interactive GUI 2D Tree approach
Hello and thank you in advance for any suggestions. I need to create an interactive 2D tree that changes, and adapts according to the user inputs into each node. This will be embedded into an already existing GUI. (Think of it as a input-reactive decision tree... visually it should be something like this: (Image ta... 22 Jul 2010 15:48

Neural Networks Question
I'm new to NN so this may be a series of dumb questions; however, here it goes.... I constructed a standard feed-forward backpropagation network using newff with one hidden layer. From what I read, it seems that there is no good rule for determining the optimal number of hidden neurons. I was planning on running sev... 24 Jul 2010 08:00

kalman filtering help needed
I would like to use a MEMS IMU (MicroStrain's Inertia Link) to record a person's head angle accelerations in 3 axes each. No problem. I would also like to integrate those accels once to get velocity and once more to get position. This is easy with trapz or cumtrapz in Matlab. When I look at these double integra... 22 Jul 2010 15:48

Animation in a Matlab plot
Hi, One way in which you can show the orbit of the satellite is to obtain the equations of motion for the satellite (can be done just that only gravity is acting on the satellite) and then use ode45 to solve for the position and velocity at each time. You can then plot these x,y,z coordinates using plot3. Also, ... 22 Jul 2010 16:54

Incorrect reading of size.
Hi, I wrote this code to rotate a small image through 360 degrees, pad it with zeros so that it is square with odd dimension and write it to file. The original version which was on a grayscale image works fine. But when I attempt to change it for rgb, it runs well until it hits 45 degrees. At that point, if it is p... 22 Jul 2010 15:48