Matlab

Neighbour search in lattice
Hello, I've spent the last 6hours trying to sort what i believe is a very basic problem but i just can't get my head around it. I have a lattice A(20,20) where the values of each cell either equal 0 or 1. What i want to do is that if a cell A(m,n) in my lattice is equal to zero, i want to search its neighbours... 19 Jul 2010 10:12

approximate hessian after ktrlink
"lulu millcreek" <lulu.millcreek(a)gmail.com> wrote in message <hul2mj$iqm$1(a)fred.mathworks.com>... Hi! Does anyone know how I can approximate the hessian from a maximum likelihood after using ktrlink (which is similar to matlab's fmincon) to get the parameters? (this is so that I can get the standard errors). ... 19 Jul 2010 09:08

Plotting in 4th Quadrant
I have to plot the sound velocity profile. Now the code works good with X-axis carrying Sound Speed and Y axis- Depth. I have plotted them in 1st quadrant, My problem is plotting them in 4th quadrant. z=data(:,2); epsilon = 0.00737; z_z = (2*(z - 1300))/1300; C = 1500.0*(1.0 + epsilon * (z_z -1 + exp( -z_z))); ... 19 Jul 2010 10:12

MATLAB 7.1 works on Win 7?
Hello, Intro: I've got MATLAB 7.1, which up until now I used on my Win XP Home, Lenovo laptop. Recently I bought Win 7 Home Premium, also Lenovo, laptop. Now I'm trying to install and use the same version of MATLAB on a new system. Problem: After inserting CD 1 and choosing Custom installation, at the 'Select dest... 19 Jul 2010 09:08

real time plot
hope this helps: y = zeros(200,1); figure for i=1:length(y) % obtain data y(i) = randn(1); % plot last point line(i, y(i), 'linestyle', 'none', 'marker','o') end Sorry, I would have been more precise, I want to plot a buffer. There is my actual algorithm but it is too ... 19 Jul 2010 09:07

problem with sorting images by creation date--help me
Hello, First thanks for 'us' reply.I tried the code to sort the images by creation date .I am giving it below. ==> indir = uigetdir(); cd(indir); allimages=dir('*.png'); [ai,ix]=sort([allimages.datenum]); len = length(ai); msgbox(num2str(len)); len1 = length(ix); msgbox(num2str(len1)); %flst={flst(ix).name}... 19 Jul 2010 08:03

Adding different sized matrix
I know you can't just add two different sized arrays, so i'd like to do the following: This cant be done: 123456 123456 123456 123456 123456 + 123456 123456 123456 So add 0s to the top 123456 000000 123456 000000 123456 + 123456 123456 123456 123456 123456 I'd like to add 0 rows to the ... 19 Jul 2010 11:19

how to manipulate pixel from an image?
hi guys, i don't really sure if my problem already being discussed or not, but on the search tools i didn't find anything so here it is: i have an .tif-image.. it belongs to uint16 and has width 1024 and height 516, so the grayvalues ranges from 0-65535... for some reason i want to manipulate each pixel and see w... 21 Jul 2010 04:50

textscan()
C{1,1} ans = 'Vout=x;' 'Vin=z;' 'eq1=A*p+B*u;' 'eq2=y*p+D*q+E*r+F*s;' 'eq3=G*q+H*r+I*t;' 'eq4=J*q+K*s+L*x;' 'eq5=M*r+N*o+O*t+2*x*P;' 'eq6=2*x*Q+R*o+S1*s+P*t+U*T+V*z;' 'eq7=W*o+N*t+X*T+R*2*x+Y*v;' 'eq8=d*w+e*v+f*u;' 'eq9=g*u+h*p+i*w+j*v;' 'eq10=k*v+l*o+m*... 19 Jul 2010 08:02

Read data with non-uniform structure
"edward kabanyas" <djuky_hmi(a)yahoo.com> wrote in message <i21a9l$kkt$1(a)fred.mathworks.com>... Hi Us, Thanks for your reply. 14:28:00 .000 000.000 01** 4847 0071 0058 +26 14:29:00 R- .033 000.000 01** 4845 0090 0058 +25 However, the column number of the data is not uniform. For exa... 19 Jul 2010 06:58