Matlab

Biulding a diagonal matrix from submatrices
Hi, I am trying to build up a diagonal matrix (A) of 3x(nxn) dimension,where n is the number of paths. Each path (p) is represented by a 3x3 matrix. Example: Let's assume we have three paths (n=3). p1=[1 1 1;1 1 1;1 1 1]; p2=[2 2 2;2 2 2;2 2 2]; p3=[3 3 3;3 3 3;3 3 3]; The diagonal matrix (A) would look like: ... 19 Mar 2010 03:48

help
I am barely starting amtlab and i am trying to figure out how f zero is working on a new m file i am writing this code function f = myfun(z) z = fzero(@x^2-4,2); z but there is an error occuring ??? Undefined function or method 'mpower' for input arguments of type 'function_handle'. Error i... 1 Apr 2010 12:21

using case statement on string inputs when number of case choices is unknown
i hav designed a drop down list in my gui that contains list of files present in a folder... but these files are diff each time the folder changes... so how do i get the handles for strings that change.. i cant set the 'value' as i dont kno no. of files in the folder... can 'case' be used while incrementing an array... 18 Mar 2010 15:29

Matlab crashes when saving the workspace
I'm having the same problem in 2009b on OSX, looks like the bug has been carried through. It only crashes on relatively large files. I'll try the compatibility mode and see if that fixes it. ... 18 Mar 2010 15:29

Is it safe to compare two numbers in MATLAB compiled DLL file?
Hi all, A kind of dummy question: we know in MATLAB .m file code, it is safe to do 2==2.0 and we can get true. My question is, does that cause problem when we compile the .m file to DLL? As it is not safe to do 2==2.00 in C/C++. Thanks, Mathew ... 18 Mar 2010 18:56

Model Advisor shows no model to advise??
Hi all, I want to check my model with the model advisor, but the model advisor shows no model that I can analyze although I start the advisor from the model to be tested. Any suggestions? I have RTW and Simulink, so at least these checks should be available. Thanx for help, Marc ... 18 Mar 2010 17:46

Cropping algorithm
I wish to crop some images on a piece of paper, let say the paper is a word document, and on the document it have paragraphs with some text and an image of a pie chart to the right, another image, to the bottom let say a logo. The teacher decided to take a picture of the document. The task is to perform an algorithm... 18 Mar 2010 16:37

Pixel selection
I have an image and I need to hand pick some pixels for analysis. I want the image to come up zoomed in, then the user can graphically select some pixels for group 1, hit a keystroke (enter or space or something), then select the pixels for group 2. I would like the pixels to become greyed out or something similar wh... 18 Mar 2010 14:19

cognitive radio spectrum sensing
hello everyone, i am working on spectrum sensing techniques for cognitive radio for my masters thesis and i am having troubles finding any codes related to my work...can any one offer me help. i will appreciate any help because i am new to matlab and i am puting too much effort but spinning in a loop...t is hard to s... 18 Mar 2010 14:19

problem with my function using distributed computing server
Hello everyone, I am trying to tun an simple example to run in my cluster: bm-cluster1.sl.ac.ud that just has been installed MATLAB Distributed computing Server 4. Running the intrinsic function @rand, is fine, it works well: a=dfeval(@rand,{1,2,3,4,5},'lookupURL','bm-cluster1.sl.ac.ud') But, if I want to ru... 19 Mar 2010 14:21