Matlab

Question about nonlinear programming fmincon
Hi all, When I use fmincon to solve a nonlinear programming problem, I have the constraint from the system dynamic equations, like dx/dt = f(x,u). Is there any way to incorporate or transform this constraint to the form, like ceq = 0, which is used in fmincon? Thanks a lot, Shu ... 3 Aug 2010 18:02

global variables in parfor loop
Greetings: I am trying to convert a normal for loop into a parfor loop. The problem I have is that two of the global variables that are declared outside the parfor loop are, however, set in the parfor loop. Is there a way around this problem? How is it that global variable can be set in for loop and not in parfor? ... 19 Jul 2010 00:34

Knot vector by averaging technique
Hi all, I want to implement chord lenth method of parameterization for B-spline curve fitting.Now, I know seven data points that are on the B-spline curve.known parameters are parameterized value of u bar. Now I need to calculate knot vector.For non-periodic knot, first and last K times U vectors are 0000 and 1111. Pr... 18 Jul 2010 20:16

Overloading functions for symbolic objects
Hello all, I wonder if there is a way of overloading functions for symbolic objects? I am writing a function that is supposed to work for numeric or symbolic inputs and I use the atan2 function, which is not implemented by the symbolic toolbox. A workaround is testing if the object's class and calling the atan funct... 18 Jul 2010 20:16

unsharp filter
hi, i am using unsharp filter from image j to enhance the images of reconstructed images from a digital hologram but i want to automate the same process in matlab i tried the inbuilt unsharp filter but it is not working well with images can anyone please help in what i am missing here? ... 18 Jul 2010 20:16

How do you enter a 2x2 coefficient matrix in the PDE toolbox
"Janice " <janlee.cy(a)gmail.com> wrote in message <h9g7q7$3j4$1(a)fred.mathworks.com>... Hello, I need to enter a 2x2 matrix for the PDE coefficient "c" in the PDE toolbox. What is the way to do it? Is it with the "assempde" command? Thanks a lot. Hi, If the matrix is [k 0; 0 k] the answer is c='k'.... 18 Jul 2010 15:57

Store a table
Hi, I have a table with labeled columns and rows. What is a recommended way to store it in matlab? (I will appreciate detail, because not farmiliar with stuctures like array or list, or with the differences between them...) Thank you Asshaf Asaf ... 18 Jul 2010 19:11

problem on how to callback multiple *.m files from a single
janas21 <janas21(a)gmail.com> wrote in message <cf5eacac-dc2e-4bd5-9fd1-0b4269189e3f(a)k19g2000yqc.googlegroups.com>... Hello, I am creating a GUI. I have to create a pushbutton which when i click it 4 other *m files have to run simultaneously. My problem is that while i know how to do it for 1 *.m file... 19 Jul 2010 11:19

Assigning a vector to a vector element
Dear Matlab Gurus, Is there an easier way to assign a vector to a vector element? I currently have to pre-declare a matrix e.g. A=zeros(10,3); A(:,1)=data(:); when really I would simply like to do A(1)=data; where data is a vector of values ... 18 Jul 2010 17:02

Problem with digits in an image name -Eg:img000111.png
Hello, I was able to read bulk images using dir('*.urformat').I am specially thankful to Steve. A new problem is faced today. I've taken snaps of a video for every 10 seconds and I've given them names like- img00001,img00002 etc...when the number in the image name reached to 6 digits like img100001 image or... 19 Jul 2010 08:03