Matlab

Really need help to speed up piece of code
Hello, everyone. I need some suggestion to make the following function faster. function psi=NLF(z,y,funvector,orig_size) psi=zeros(size(y)); Y=ifft2(reshape(y,orig_size)); for fun=funvector fY=feval(fun{2},z,Y); kY=fun{1}.*fft2(fY); kY=kY(:); psi=psi+kY; en... 4 Aug 2010 13:36

zeros(100000, 3000); --> is possible
since I get: ??? Out of memory. Type HELP MEMORY for your options. any help...? ... 4 Aug 2010 16:53

DISABLE NNTRAINTOOL WINDOW
Hello, I'm doing a caracter classification using the neural network toolbox. I created my own GUI and when matlab does the training, the nntraintool gui window pops up... Is there a way to hide this nntraintool window while the training is taking place? tks. ... 4 Aug 2010 13:36

mXCreateNumericArray (Crashing program)
Hello, So I am new to the whole mex file and I'm using a fortran file which has been working great through mex until I added the mxCreateNumericArray Command. After adding this command if I try to cal the function cmsl4Integrated (tempVec,zbndryVec) from matlab it crashes with "Out of memory. Type HELP MEMORY fo... 4 Aug 2010 15:47

Multithreading: Different in 64 and 32 Bit Versions of Matlab?
Dear all, I just upgraded to a Windows 7 64 bit box, multicore, 6GB. I installed the 32 bit as well as the 64 bit version of Matlab 2008b (I'm currently stuck with this version). I checked that both versions are actually able to use multithreading using the following code, which led to the use of 4 cores: a = ra... 6 Aug 2010 12:40

Structural arrays to animation
Hey... my understanding of how to convert a series of .fig files to an animation is based on the advice given to me in a previous post. Here is what I have, which is incorrect due to my unfamiliarity with structural arrays... fh=figure; open 1.fig; M(1)=getframe(fh); open 2.fig; M(2)=getframe(fh); open 3.fig; ... 4 Aug 2010 19:04

importing data into MATLAB
Hi group, I've two questions related to MATLAB, and I'd really appreciate if anybody can provide me any suggestion (s) to resolve the issues. 1) I created 100 data sets using a geostat software. The datasets are named as A.001, A.002, A.003, ..., A.100. How can I read all these data sets separately? I tried using... 4 Aug 2010 13:36

Need a GPS L1 sampled signal .dat file
Hi, I'm making a GPS software receiver usiing Matlab, for which I require a .dat file containing at least 50,00,000 samples of the received GPS L1 signal, downconverted at an IF of 1.25 MHz and sampled at 5 MHz in A/D converter. I can't arrange for its front-end hardware, and is looking for such a file for further pr... 4 Aug 2010 12:30

Isocline line - 2D
du/dt=((1 − u)(u −M)(u^2 + A)−v)u dv/dt= B(u−C(u^2 + A))v I have to draw "The u-v zero-growth isoclines". The critical points: 1. P0 = (0, 0) 2. PM = (M, 0) 3. P1 = (1, 0) 4. P4 = (u4, v4) 5. P5 = (u5, v5) Note that du/dt=0=dv/dt implies v = (1 − u)(u −M)(u^2 + A) u =... 5 Aug 2010 00:31

Why no fminsearch in MultiStart?
Just wondering if there is a particular reason for fminsearch not being one of the allowed local solvers for the global optimiser MultiStart? As far as I can tell there is no reason why fminsearch could not be used at each of the start points... I have (what I believe to be) a non-smooth surface to minimise and would b... 5 Aug 2010 18:02