23 total contributions since 2009

Professional Interests: acoustic, cetaceans, sparsity, randomization, array processing

Solved

Determine if input is odd

Given the input n, return true if n is odd or false if n is even.

5 years ago

Solved

Times 2 - START HERE

Try out this test problem first. Given the variable x as your input, multiply it by two and put the result in y. Examples:...

5 years ago

Responded

Re: functional basis representation

Hi Matsya, You could use the Atomizer to find which bases are closed to your signal. http://citeseerx.ist.psu.edu/viewdoc/summa...

7 years ago | 4063 views

Responded

Re: Wavelet coefficients -- what do they mean exactly?

Hi Frank, If you know what frequencies have to be isolated, and just want to determine what are their amplitudes, there are too...

7 years ago | 33673 views

Responded

Re: Create a Word document using Matlab

Hi Jasper, I use the command "notebook". http://amath.colorado.edu/computing/Matlab/OldTechDocs/notebook.pdf It needs a small ...

7 years ago | 39519 views

Responded

Re: mex-file and reference

I thought my search could be useful on this topic to beginners. The solution is to use Open Watcom: http://www.openwatcom.org/...

7 years ago | 6234 views

Responded

Re: finding eigenvalues of a sparce matrix

Hi Stonerain, Maybe the solution is to "decouple" your matrix. If you break your matrix in small matices, then the spectrum of ...

7 years ago | 2057 views

Responded

Re: xcov for analytic signal

Hi, You should try to repeat the shorter signal if you can consider it as a pseudo-periodic or do some symetry to avoid side ef...

7 years ago | 1519 views

Responded

Re: Speeding up the Code

Hi, As a beginner in embedded C, I never know if I have to optimize my code with inline. I think that the use of inline is lik...

7 years ago | 2519 views

Responded

Re: Calculation Lyapunov exponent from a given time series

You can use the Box-Counting m-file available on the File Exchange. It is not the lyapounov exponent but the local exponent. How...

7 years ago | 5112 views

Responded

Re: 32-band polyphase quadrature filter (PQF) bank

You have to look at the "Wavelab toolbox". They use mirror filter (pQMF) but it is what you want for your MP3/OGG-like codec.

7 years ago | 2740 views

Responded

Re: Matlab encoder

Hi Matthieu, I had the same problem last month and my solution was to get a .avi file with movie2avi and to use an encoder writ...

7 years ago | 1811 views

Posted

read data from text file

Hi Mike, I am not a Guru about text file, but when I read a binary file in Matlab or in C, I always check the result of fopen. ...

7 years ago | 2367 views

Responded

Re: Cholesky positive definite check

I have checked in the book "Matrix Computations" of Gene H. Gollub. Here is what I found : %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%...

7 years ago | 8446 views

Responded

Re: Problem with the size of a .mat-file

Thanks, but I do not post without typing help in the prompt a lot of time ;). I have finally found the matfile format descripti...

7 years ago | 3594 views

Responded

Re: Compress ratio

Quotient_compression = length(vector_before_compress(:))/length(vector_after_comp(:)); Compress_Ratio = 1/Quotient_com...

7 years ago | 1111 views

Responded

Re: How to store a binary sparse matrix

Sorry, It's not really a problem. I know there is different ways to stock a matrix. Compressed Row Storage Compressed Column St...

7 years ago | 5182 views

Responded

Re: How to store a binary sparse matrix

Hi Michael, My matrices are composed of randomly spaced '1' . A good example is: mat_bin = full(spones(sprand(4410,513,0.2)));...

7 years ago | 5182 views

Posted

How to store a binary sparse matrix

Hi, I am trying to compress some binary sparse matrices with the minimal amount of data. I have implemented CSR,CCS, jagged... ...

7 years ago | 5182 views

Responded

Re: how to make a new line? \n doesnt work.

fprintf is better than fwrite%% str = ('word\nnew word'); fid = fopen('skipline.txt', 'w+t','n'); fprintf(fid, str, 'char'); ...

7 years ago | 27501 views

Responded

Re: strings using xlsread

I had the same problem last summer. My solution was to use a macro in Excel to separate lines with "yy" and "ca" (very simple e...

7 years ago | 2004 views

Responded

Re: From instantaneaous frequency to analytical signal

Yes, you're right. But I thought I could create a signal of the form for k = 1 : length(t), end where tk and fk are the coordi...

7 years ago | 2273 views

Posted

From instantaneaous frequency to analytical signal

Hello everyone, I am trying to develop a dictionnary of signals to use it in an application. To create these signals : -I dra...

7 years ago | 2273 views