Matlab

Question on the derivate /calculus of a 2-norm matrix . Thanks a lot
Hi, all, I wonder how to solve the following problem: Assuming g(x)=||KX-B||^2 where both K and X are matrices and B is a vector, please compute \partial{g}/\partial{x} . I don't know what the exact answer is. Checking some related stuffs, I think the answer might be 2K^{T}(KX-B). Could you please show me ho... 25 Jul 2010 23:48

variance x n is called?
what is n times variance called where n is total number of samples. nxσ2 until recently i remembered . it starts with letter s .can anybody reply for me plz ... 26 Jul 2010 00:52

Radial Bases Function Networks with K means
HI, I want to use a Radial Bases Function Networks with K means (for center determine). Would you please tell me how can I do this with matlab function? Best regards ... 28 Jul 2010 21:45

Vectorized dynamic field references?
Is there a way to access multiple structure fields without using a loop? s=struct('a',2,'b',4,'c',6) fn = {'a' 'c'} for i=1:numel(fn) % This loop seems superfluous a(i)=s.(fn{i}); end a % returns [2 6] The expected solution a = s.(fn) doesn't work. This seems like an oversight in MATLAB's implem... 25 Jul 2010 14:02

Arithmetic on one column only of an array
I bet this is so simple - but I'm new to Matlab. I have tried to guess from other matrix manipulation and can't find it in the help. I create an x,y matrix and now I want to divide the last column (col 4) by a number - but only the last column. Here's what I added to my function to make this happen: y(:,4)=y(:... 26 Jul 2010 06:11

Instrument Control Toolbox - Newbie
Hi Guys, I have a project to operate a radio-controlled car. I have basic knowledge in Matlab. I understood that I have to use the Instrument Control Toolbox. Is that correct? Can you please let me know how can I approach this project? ... 26 Jul 2010 11:37

seperation of overlapped object
hi, i am a software student .i am doing project regarding cytogenetics using matlab.i need a code for seperating the overlapped object.please help me out..... ... 29 Jul 2010 04:14

figure and plot handles
I have a few figures and I would like to change the name on figure 2. I only have the plots handles available for esh figure, how can I obtain figure 2 handle and change the window name with set? 'gcf' only obtains the latest figure handle that was processed. ... 25 Jul 2010 11:52

PID-LQR
I want to combine between PID n' LQR... what are the step to design the PID-LQR controller? How to get parameter of Kp, Ki n' Kd with matlab program ... 25 Jul 2010 03:21

[HELP]how to write matlab program using PI based on LQR
i want to know how to write matlab program..i'm using PI based on optimal control (LQR)..please give me example..with state space system.. ... 25 Jul 2010 03:21