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Vieniava


Active since 2011

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freelancer from Poland
Professional Interests: signal processing, digital/analog communications, RF, Software Defined Radio, Cognitive Radio, SIGINT, COMINT, radiomonitoring, steganography, algotrading, forex, image processing, photography, pattern classification, statistics

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Answered
Text location
check this out: <http://www.mathworks.com/help/releases/R2012a/techdoc/creating_plots/f0-4741.html Adding text annotations to g...

meer dan 9 jaar ago | 1

Answered
How can i add echo to a signal
For example: to add an echo after 1s (with amplitude=0.1, phase=pi/3.5) and echo after 1.5 seconds (with a=0.5 and phase=1.2*pi)...

bijna 12 jaar ago | 1

Answered
Getting rid of a black background surrounding an Image
[row col pg] = size(bg); pg = zeros(row,col,'uint8'); gr = 255*ones(row,col,'uint8'); canv = cat(3,pg,gr,pg); image(canv)

bijna 12 jaar ago | 0

Answered
Compute PSD from fft compared with spectrogram
Spectrogram is time-frequency (3D=time vs freq. vs amplitude) representation of a signal and periodogram/fft is frequency only (...

bijna 12 jaar ago | 0

Answered
IFFT of Gaussian-filtered real signal is complex - why?
Your Gaussian filter is *NOT* symmetric in frequency domain. Check this out: stem(fftshift(gaussFilter)) it suppose...

bijna 12 jaar ago | 1

Answered
How can i add echo to a signal
load handel; echo_delay = 0.5; % in seconds echo_delay_s = round(echo_delay*Fs); % delay in samples ...

bijna 12 jaar ago | 1

Answered
How to get the number of bin and bin edges from chi2gof test
Use this kind [h,p,stats] = chi2gof(...) Then: NumberOfBins = numel(stats.O); And boundaries of i-th bin are: ...

bijna 13 jaar ago | 0

Answered
How to reconstruct a sound with data in MATLAB?
Try this: fs=8000; soundsc( pressure-mean(pressure), fs) You should know sampling frequency used in data collecting - here...

meer dan 13 jaar ago | 0

Answered
which TI's MCUs are supported by Matlab
<http://www.mathworks.com/products/embedded-coder/ti-adaptor.html>

meer dan 13 jaar ago | 0

Answered
User Defined Function syntax
*Function hints* this is all about. In MATLAB R2008b writing your own hints is not possible - check response #7 on <http://blogs...

meer dan 13 jaar ago | 4

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Answered
Phase-plot when using freqz
It is a matter of expressing angle in degrees or radians. Replace: plot(w,angle(H)) with plot(w, 360/(2*pi)*angle(...

meer dan 13 jaar ago | 1

| accepted

Answered
Referencing the name "MATLAB"
spelling: <http://www.mathworks.com/products/> EDIT (Good point, Andrew!) pronunciation: load mtlb sound(mtlb)

meer dan 13 jaar ago | 1

Answered
Unstable streaming from external device
I suggest you to use |serial| as in <http://www.mathworks.com/help/techdoc/matlab_external/bytesavailablefcn.html>. Here is how...

meer dan 13 jaar ago | 0

Answered
Ouputting for loop into a matrix
Try this: Ci=0.1:0.1:30; Cd=0.1:0.1:30; y=zeros(numel(Ci), numel(Cd)); for i=1:numel(Ci) for j=1:numel(Cd) y...

meer dan 13 jaar ago | 1

Answered
USRP N210 Interfacing
No. Currently USRP N210 (it uses UHD) cannot be run in Simulink.

meer dan 13 jaar ago | 2

Answered
DSSS Plotting
Try this: plot(20*log(abs(fft(DSSS_time_domain_signal))))

meer dan 13 jaar ago | 0

Answered
How to find the maximal and minimal derivatives of noisy signals?
*Differentiator filter* should satisfy your needs. You can use it in your mfile - <http://www.mathworks.com/help/toolbox/filter...

meer dan 13 jaar ago | 0

Answered
Uitable's properties
you can simply check the set of properties via: hT=uitable; get(hT)

meer dan 13 jaar ago | 1

| accepted

Question


May I buy idyvidual commercial license in other country I live?
I found that within EU there are significant differences in pricing (incl. tax rates and currency exchange). So the question is....

meer dan 13 jaar ago | 1 answer | 0

1

answer

Question


How to mask an email address using m-code?
For example my email could be masked as follows: [char([21 8 4 13 8 0 21 0]+97) '@gmail.com'] But this is trivial and very r...

meer dan 13 jaar ago | 5 answers | 1

5

answers

Answered
[DISCONTINUED] Wish-list for MATLAB Answer sections.
* replace *votes* by *voting points* IMHO, voting should be connected with reputation (of a person who does the act of voting ...

meer dan 13 jaar ago | 0

Answered
want m fille
<http://www.mathworks.com/products/wavelet/demos.html Wavelet Toolbox demos>

meer dan 13 jaar ago | 0

Answered
How do I divide an image into blocks for processing?
Suppose *|I|* is your image matrix. Trivial way is shown below: s=size(I); wing=1; % ;) bs=2*wing+1; % block...

meer dan 13 jaar ago | 0

Answered
handling audio files
Check this out: % v1, v2 - two vectors are given len1=length(v1); len2=length(v2); % LEN=min(len1, len2); V1...

meer dan 13 jaar ago | 0

| accepted

Answered
Vector scope.
The problem is in similar wave duration time and sampling time. You may increase your rate of simulation or slow your waveform....

meer dan 13 jaar ago | 1

Answered
power spectral density of image
Try this: imagesc( log10(abs(fftshift(fft2(Picture))).^2 ))

meer dan 13 jaar ago | 0

Answered
normalisation of frequency axis while using fft function in matlab
You must know frequency sampling, *Fs* . Look at this code: Fs= ; % insert here your frequency sampling in Hz L=length(Va...

meer dan 13 jaar ago | 0

| accepted

Answered
1D array, elements are 2D matrix [test]
What about this: Y(:,:,1)

meer dan 13 jaar ago | 0

Answered
delimiter usage
It seems to be impossible to use two-spaces-delimiter. You can try make your own *|dlmwrite|* function by edit the original. T...

meer dan 13 jaar ago | 1

| accepted

Answered
Application of the Sptool filter
Your generated mfile suppose to look like this %UNTITLED Returns a discrete-time filter object. % M-File generated by MATLA...

meer dan 13 jaar ago | 0

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