Matlab

new random matrix from an existing matrix
Hello, I have a question regarding random function assume that we have: a=[1 2 3 4 5 6 ..... 365] where a is 1 X 365 matrix I want to generate a new matrix b which contains 75 % random entries from matrix a which means that the number of b entries is 274 entries but these 274 entries w... 24 May 2010 13:27

Minimum Cluster Distance for RBF?
Hi Greg, if i have a regression problem, how I can adjust the parameters of newrb?. Thanks ... 25 May 2010 13:31

to group time series values
Hello I have a serie like the one shown below 2 4 6 Nan Nan Nan -2 -6 -4 Nan 3 4 Nan Nan .... What I get is the average of the first group of positive values, and assign this value to the highest in this subset. Similarly for the negative subset, and so with all the subsets that I have. I would ap... 24 May 2010 13:27

matlab tool to evaluate mesh quality?
Hi all, I have tried to search for some easy-to-use tools in Matlab to allow evaluation of mesh qualities. Anyone has any info where to find? For example, to check the aspect ratio, min/max angle, etc., mostly for volumetric meshes? I am particularly in need to evaluate mesh qualities for hexahedral elements. Howeve... 24 May 2010 12:20

Find an element in a cell array
Hi there, How can I find en element inside a cell? I mean the row and column?? Say that I have the following: stts = {'Gable','Hip','Shed','Other'}; var = 'Shed' I need to know that var is in position (1,3) of stts. Any ideas??? Thanks ... 24 May 2010 16:48

wavelet padding
I have a general question about padding a signal prior to applying wavelet transform to it. My question is: Is it really necessary to pad my signal to 2^n data points because in the wavelet toolbox, there is already a default symmetric padding? I am using discrete wavelet transform to analyze my signal. I have run a ... 25 May 2010 16:51

how to concisely choose the first element in a vector modifiedby a conditional statement?
Pinpress wrote: I need to choose the first element of a vector that's modified by a conditional statement. For example, suppose: I = [1 2 3 4]; R = logical( [0 1 0 1] ); Then I(R) returns [2 4]. What I need to do is to find "2" and assign it to a new variable, which has to be a one element... 24 May 2010 12:20

MATLAB Mobile is available via Apple's Apps Store
MATLAB Mobile for iPhone is now available via Apple’s App Store. MATLAB Mobile provides a lightweight MATLAB desktop for the iPhone that connects to MATLAB running on a computer. It provides command line access for MATLAB and any add-on product for which a user is licensed. To install, the licensed user dow... 27 May 2010 09:15

how to concisely choose the first element in a vector modified by a conditional statement?
Hi, I need to choose the first element of a vector that's modified by a conditional statement. For example, suppose: I = [1 2 3 4]; R = logical( [0 1 0 1] ); Then I(R) returns [2 4]. What I need to do is to find "2" and assign it to a new variable, which has to be a one element. I can do the following: t =... 25 May 2010 12:25

Incorrect Sound Pressure Level from FFT in Matlab
i'm no expert in the topics discussed above and don't want to be crucified for trying to contribute, but this is a forum so what the hell...i've come across similar posts before, and vaguely remember a note about r.m.s accuracy calculations based on the fft algorithms. could it be that the same formula is used to calc... 24 May 2010 11:13