Matlab

While loop for ode45 solver
I have written a program that simulates the trajectory of a probe entering earth's atmosphere. This trajectory is modeled by 6 differential equations. I am using ode45 to solve these equations. I would the solver to calculate a solution until the probe hits the ground, but the point at which it hits the ground is o... 2 Mar 2010 10:05

My code: how to capture a 2D array and number of iteration
Hello I am using Matlab. I have a 2D array r(i,j), which I am performing iteration on. At the end of each iteration level, k, I get the value of r(i,j). I would like to store the value of r(i,j) at any iteration level k, but I don't know how to program it. I hope someone can advice. Here is my code so far. Than... 1 Mar 2010 22:04

Base Excitation in simMECHANICS and simulink
Hello All, I am trying to use SIMMECHANICS within simulink to model a 1 dof vibration system. I got the model to work with force excitation to the mass and I was wondering how I could go about achieving BASE excitation. Thank you in advance -Ali ... 3 Mar 2010 14:08

Image Averaging with Matlab
Is there a function in matlab like imfilter() that do Image averaging? Taking two images and average it. ... 2 Mar 2010 06:46

are try catch blocks expensive
Hi I often come across situations in my code where I will have two options, one is to get away easily using try catch blocks and the other one is to add many more lines for validations. I just wanted to know how expensive (computationally) are try catch statements? Thanks Prabhakar ... 2 Mar 2010 06:46

MATLAB CONJUGATE GRADIENT
I have a question suppose i want to solve equation, I know it can be done by matlab PCG But if i want to do... X= A/B (cholesky factorization) when A is symmetric What will it adopt when A is not symmetirc..... This will sound kiddish but will the answer will be same if i solve it using X= inv(B)*A; In a... 1 Mar 2010 20:58

DCC GARCH forecasting code
> > Hi, i am doing the same research as you,i have the same problem as you.but i need to estimate dcc garch at first.so if somebody know the estimation code of dcc model please post it here.thanks! zhang ... 1 Mar 2010 20:58

Programmatcially re-focus back to command window or editor?
Assuming that I have my matlab command window and the figure window placed side-by-side. Also assume that I already opened figure 1 in the figure window. After I typed "figure(1)" and hit Enter in the command window, figure 1 will be the focus and highlighted. I can click in the command window to re-focus back to th... 2 Mar 2010 19:12

Loading an image WITHOUT image processing toolbox
I would like to load a series of images so that I can insert them into a powerpoint using Matlab. When I load an image using "imload" and then "image" to display it, the image quality is extremely poor (unusable). Is there a way to load an image and maintain the image quality? The images are jpegs that Matla... 2 Mar 2010 10:05

contourm contour line gaps
I'm still looking for some ideas on how to get my contour lines to always go to the edges of my map. I've used contourm for various meteorological datasets now, and this is always a problem. The code I attached in the orignal post below might be more than needed. The actual contourm command is toward the bottom and is ... 1 Mar 2010 18:43