Matlab

FFT
New Matlab user here. I have been given some data and asked to do a couple of things. First, was to take a FFT to find the frequency of an oscillation that should be present. The data is amplitude data as a laser was swept from frequency A to frequency B with step size N. the amplitude was recorded at every N. So I hav... 10 May 2010 09:51

Matlab code for load flow analysis in radial distribution system
hello dear; i m elcrical student working on radial system; hope so u got the any clue on above topic then please help me yarrrr. thanking you. ... 7 May 2010 11:08

Proposal: Quick notation for bsxfun()
Hi. This is an idea I am throwing out to see what happens. I propose that matlab introduce a quick-notation form for bsxfun. I propose that this notation would follow in the footsteps of the .* notation (.* ./ .^) in that it uses two letters where the first one is an indicator that something unusual is going on, i... 7 May 2010 12:14

Error building Real-Time Workshop
Hi everyone, I am using Matlab R2007b and Dspace 1103. After Ctrl-B, i got error msg : Error building Real-Time Workshop target for block diagram 'parabaz'. MATLAB error message: Error using ==> callMakeHook at 49 The call to rti1103_make_rtw_hook, during the before_tlc hook generated the following error: ... 7 May 2010 11:08

Contour recognition pattern
I am requesting some help in a pattern recognition problem. Basically, I have two complex signals of which I have 50 samples of each. Each grouping of samples is a matrix of size 13 X. 80. I have taken each of the 50 matrix sees and added them together in order to get a "average" sample pattern. I can then generate a ... 7 May 2010 11:08

Genetic algorithm with bitstring
I have a problem with implementing a genetic algorithm (first time for me in Matlab & the optimtool) I have a matrix of 756 columns and 25000 rows. Where the columns represent locations, the rows represent time and the actual values are (hourly summed) measured quantities. Now I sum over the columns to get 25000 val... 10 May 2010 08:45

Steady State with SimBiology
Hi everyone, I was surprised to not find a out-of-the-box way to calculate the steady states of a SimBiology model. Or did I miss something? Thanks a lot! ... 7 May 2010 15:36

Converting date to serial date (Beginner problem)
Hi, I'm a new user of Matlab, so I guess this one should be pretty easy. I have a dated time-series (yyyy-mm-dd) and I want to convert the dates to Matlab serial dates. time = datenum(dates,'yyyy-mm-dd') This doesn't seem to work, and I get different errors when I try to tweak the command and inputs. F... 7 May 2010 16:43

matlab precision determinant problem
I have the following program %*************************** format compact; format short g; clear; clc; L = 140; J = 77; Jm = 10540; G = 0.8*10^8; d = L/3; for i=1:500000 omegan=1.+0.0001*i; a(1,1) = ((omegan^2)*(Jm/(G*J))*d^2)-2; a(1,2) = 2; a(1,3) = 0; a(1,4) = 0; a(2,1) = 1; a(2,2) = ((omegan^2)*(... 7 May 2010 14:29

Error in Matlab communication with Com ports
Hello, I execute the below code and the time i get is different s=serial('COM3'); fopen(s); tic; fprintf(s,'„') toc for example Elapsed time is 0.008988 seconds. Elapsed time is 0.017026 seconds. Elapsed time is 0.009243 seconds. Any suggestions why the elapsed time is different in msec and not i... 7 May 2010 08:54