Matlab

efficient way to compute cross-correlation sequence at specific lag?
hi board: Say I have a 60000 x 120 matrix A, I want to compute the cross-correlation sequences at a set of specific lags, for example lag [0 1 2 10 20 100 2000 30000]; from The XCORR function: XCORR(A), when A is an M-by-N matrix, is a large matrix with 2*M-1 rows whose N^2 columns contain the cross-correl... 17 May 2010 22:24

efficient way to compute cross-correlation sequence at specific lag?
hi board: Say I have a 60000 x 120 matrix A, I want to compute the cross-correlation sequences at a set of specific lags, for example lag [0 1 2 10 20 100 2000 30000]; from The XCORR function: XCORR(A), when A is an M-by-N matrix, is a large matrix with 2*M-1 rows whose N^2 columns contain the cross-correl... 17 May 2010 21:18

ADX, +DI, -DI, parabolic SAR
Natanel, Did you ever end up writing the Parabolic SAR? I am trying to do that, but have thus far been unsuccessful. Ideas? natanel <jn_eizenberg(a)hotmail.com> wrote in message <ef35133.0(a)webx.raydaftYaTP>... I wrote the ADX, +DI, -DI and ADXR if some one need it mail me and I will mail the code back ... 17 May 2010 20:13

NaN's in curve fitting
Hello, This is another question regarding curve fitting, please. In the curve fitting documentation it says that ' Curve Fitting Toolbox software ignores Infs and NaNs when fitting'. This is the case when I fit a curve interactively. However, if I generate code then I get the error message ??? XDATA, YDATA or WEIGHT... 17 May 2010 20:13

helo
i have some know how about color theory and related things but my problem is just to have some guiding codes for my current problem, i.e. to compare the two images taking the first as a standard then give decision (pass/ fail format) thanks ... 17 May 2010 22:24

Laplace transform of Heaviside function with shift
I am just learning how to use symbolic Laplace transform and have difficulty with the Laplace of Heaviside function with shift. Here is what I found: 1) laplace(heaviside(t) works and gives 1/s 2) laplace(heaviside(t-sym(1)) works and gives 1/(s*exp(s)) but 3) laplace(heaviside(t-a) does not work and does not giv... 17 May 2010 19:06

Help reading in TMY3 (.csv files) data into Matlab
Hi guys, It would be greatly appreciated if I could get a quick point in the right direction, I am completely new to matlab, but have experience with C and Java. I have a program which needs to grab data given a longitude and latitude. With these 2 variable inputs, I will read this CSV file: http://rredc.nrel.go... 23 May 2010 00:41

quasi monte carlo with sobol sequence
Hi all, does any one have an example how to use Matlab capability to generate random normal variables using Sobol sequence? I have stat add in with sobolset but not that clear how to use it to get random normal distribution. thanks in advance! ... 11 Jun 2010 10:19

BIJECTION ISSUE, iradon(radon(L*L)) --->(L+2)^2
F=radon(LxL,theta), but iradon(F,theta) ----> (L+2)x(L+2) !!! HELLO THERE, I have a question, isn't iradon supposed to return an array of the same dimensions as the one given to radon? I have tried with all kinds of projections and sizes, the only difference is that when the original matrix is of odd side, t... 25 May 2010 20:09

find distance along complicated geometric surface
hi all, I am working on a project and I have hit a wall and could really use some help. I am trying to find the distance between two points on a shape that is defined by vertices and faces. I can't just use the distance formula because I need to make sure that the entire distance between the two points is in con... 18 May 2010 15:53