Matlab
in [Programming]
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matlab 'format' produces unexpected results Hello, I recently started to get the following behavior in matlab outputs which I illustrate with the following examples: 5001/9 = 555.6667 (ok) 5001/8 = 625.1250 (ok) 5001/7 = 714.4286 (ok) 5001/6 = 833.5000 (ok) 5001/5 = 1.0002e+003 (UNWANTED FORMAT!) 5001/4 = 1.2503e+003 (UNWANTED FORMAT!) 5001/3 = 1... 9 Aug 2010 08:59
result of sum(LargeArray) changes from execution to execution Running Matlab 7.8.0.347 (R2009a) under WinXP on an Intel Core 2 Duo processor, executing the command sum(a(:)), where a is a 304x446x12 single-precision matrix, gives slightly different results when run multiple times. Here's what I'm doing, with the file example.mat that can be downloaded from ftp://ftp.npolar.no/Ou... 9 Aug 2010 08:59
remove a specific frequency from emg signal Dear Debora, I have an emg signal that has a huge peak in a very low frequency, something between 0.5 and 1.2 hz. After filtering with a high pass butterworth of 20 hz and order 9, I could only reduce this peak, that is now half of its size, but still way higher then the signal. I've tried to change remove all sig... 9 Aug 2010 08:59
Incorrect eigenvector when using eigs with very large, sparse matrix I'm trying to use eigs to get the dominant eigenvalue and eigenvector for a symmetric, sparse matrix of size about 3.6 million (square). Specifically, the matrix is an adjacency matrix for a graph and has only zeros and ones as entries. Since the matrix is non-negative, the Perron-Frobenius theorem states that the domi... 9 Aug 2010 11:12
remove a specific frequency from emg signal "Debora " <debi_can(a)yahoo.com.br> wrote in message <i3opqd$t5i$1(a)fred.mathworks.com>... Hey, all. I have an emg signal that has a huge peak in a very low frequency, something between 0.5 and 1.2 hz. After filtering with a high pass butterworth of 20 hz and order 9, I could only reduce this peak, that is now half ... 9 Aug 2010 08:59
Restructuring cell arrays with cellfun "Jarodd Holmes" <lapaipishki(a)googlemail.com> wrote in message <i3ic4o$25e$1(a)fred.mathworks.com>... Dear fellow Matlab users, I am trying to solve the following problem: I have a cell array with 500 cells, each cells contains 4 arrays with information (it is basically a cell array and each cell contains... 9 Aug 2010 08:59
Threading Hi! I have a program that basically does three things. 1) Collect an image from a camera. 2) Do some image processing. 3) Plot the results. Step (2) and (3) are quite slow compared to step (1) and it would be preferable to execute all these steps in parallel. Step (1) is a call to a threaded mex-file and the... 9 Aug 2010 08:59
General MATLAB text (was Re: 11 New MATLAB and Simulink Based Books) Are there any general textbooks about MATLAB that cover the newer language features including object-oriented programming? Hanselman & Littlefield's "Mastering Matlab 7" is excellent and is roughly at the level I'm look for. Does anyone know if a new edition is planned? A "Matlab Cookbook" along the lines of the O... 10 Aug 2010 10:12
representing eigenface onto the basis Hi friends I am currently doing a face generation process. A number of eigenfaces is generated by PCA. However, now I need to represent them. Some literature says I need to multiply a coefficient. The example contains both positive and negative numbers. So it is may not be the eigenvalues. Is any body could te... 9 Aug 2010 07:54
An exact simplification challenge - 105 (AppellF1, EllipticE/K) Hello, Sqrt[2*(1 + Sqrt[2])]* (AppellF1[-1/2,-1/2,-1/2,1/2,-2*(Sqrt[2]+1),2*(Sqrt[2]-1)] + 4*AppellF1[1/2,1/2,1/2,3/2,-2*(Sqrt[2]+1),2*(Sqrt[2]-1)]) + 4*(-EllipticE[-3 - 2*Sqrt[2]] + (1 + Sqrt[2])*EllipticE[Pi/8, 4 - 2*Sqrt[2]] + EllipticK[-3 - 2*Sqrt[2]]) ... 9 Aug 2010 07:54 |