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how I can analyze this magnitude of 1D signal
You have a real-valued signal, so you only need 1/2 your magnitudes. I can't tell from your graph if your signal has even length...

12 years ago | 0

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Licence for Matlab or for both Matlab and Simulink?
Simulation data inspector is part of Simulink. A license just for base MATLAB does not have Simulink included.

12 years ago | 0

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how to start with image steganography using wavelet transform method in matlab
<http://www.cs.cornell.edu/topiwala/wavelets/report.html wavelet steganography>

12 years ago | 0

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while running d code below error is showing and can i inecrease the height of the stem.
exp() does not accept uint8 inputs. Do your data have to be uint8? Can you cast both your f and data variables to doubles? ...

12 years ago | 0

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How to do an nonuniform signal FFT?
You can use interp1() to interpolate the data to an evenly spaced grid, or you can use software specialized for this task: <h...

12 years ago | 0

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Why am I getting this error for Fspecial?
Are you sure that you are using MathWorks' version of fspecial()? If you enter >>which fspecial Do you get something ...

12 years ago | 0

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how I can analyze this magnitude of 1D signal
If the large value shown in the figure corresponds to 0 frequency, then that simply means the signal has a nonzero DC value. The...

12 years ago | 2

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see the contents of the function 'filter'
The algorithm is detailed on the reference page >>doc filter

12 years ago | 0

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Wavelet transform for matlab
imwrite() can save an image in .jpg format. Keep in mind JPEG2000 uses wavelet compression.

12 years ago | 0

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Two-side spectrum in Matlab
Youssef is correct. Why do you think that f2 will only show up as a "negative" frequency. sin() is an odd function so sin(-t)...

12 years ago | 0

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how can i apple fourier analyiss on vector of 736 temperature readings?
Image Analyst has given you some good advice. Since your sampling frequency is 8 samples/day, your frequency vector will run ...

12 years ago | 0

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How to get from discrete time impulse response vector to plot of frequency spectrum
Since you have a discrete-time sequence with data sampled at 44.1 kHz, your frequency vector will run from -22050 Hz to 22050 Hz...

12 years ago | 1

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Why FFT results are different from theory?
Your statement that the Fourier transform of a square wave should be purely imaginary is based on the assumption that the square...

12 years ago | 0

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Why FFT results are different from theory?
I'm not sure why you are saying the results are different from the theory. fft() is just an efficient implementation of the D...

12 years ago | 0

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How to get vector output?
Why would you expect a vector out of that equation? That equation is of the form z = f(x,y) It is producing a scalar (real...

12 years ago | 0

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upgrading license server to 2013b
Hi Ron, these types of questions are always best directed to tech support: <http://www.mathworks.com/support/contact_us/index...

12 years ago | 0

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how can I change the view of command window in matlab R2013b
On the Home tab, go to "Preferences" in the Environment section. In preferences click on "fonts" in the left-hand pane, and t...

12 years ago | 0

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something is wrong with the X_AXIS!
From the freqz() output, the filter has approximately the correct passband from about 2400 Hz to the Nyquist of 12 kHz. You know...

12 years ago | 0

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how can i implement band pass filter in an image?
One way is to design the filter in 1D and then use ftrans2() if you have the Image Processing Toolbox to transform the filter in...

12 years ago | 0

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Correlation between mother wavelet and ECG signal
The results for wavelet denoising should not be that heavily dependent on the choice of wavelet. For EEG data, I would recomm...

12 years ago | 0

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what is the criteria to select the mother wavelet for analysing a signal.?
You don't want to use wavefun() in that way. Use the wavelet transform and then analyze the distribution of energy in the wavele...

12 years ago | 0

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Spectrogram plot without using spectrogram command
You can use imagesc(), or surf(), for example. Look at the help for spectrogram(), I realize you are not using spectrogram()...

12 years ago | 0

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How to Stretching and shrinking a graph
You can simply dilate the independent variable in the function x = 0:0.01:10; y = sin(x); y2 = sin(x/2); plot(...

12 years ago | 0

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How to choose Spectrogram parameter ?
NFFT is based on the length of the segment, not the length of the signal. Choosing the segment length is the most important para...

12 years ago | 0

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Calculate Sum of Square Error
You get the yhat values by plugging your observed X-values into the equation determined by your regression fit. You have an equa...

12 years ago | 0

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Calculate Sum of Square Error
The sum of square error in regression is the 2-norm squared of the residuals, so if yhat are your fitted values, and y are the o...

12 years ago | 0

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How do I transfer my PC stand-alone Matlab license to a new Mac Matlab stand-alone license?
http://www.mathworks.com/support/solutions/en/data/1-16WI3/

12 years ago | 0

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SEMILOGY not printing proper y axis labels
Without the data, it's difficult to say exactly what is going on, but can you just set the yticks? y = 0.1:0.5:24; ...

12 years ago | 0

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Plot histogram on matlab
You just have to save each value of C as an element of a vector. stock(1) = 675.15; delta_t = 1 / 30; volatility = 0....

12 years ago | 1

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From where can I get an audio signal file with less than 1000 samples for an audio signal processing program in matlab?
load mtlb; audiosamp = mtlb(1:999); The sampling rate is 7418 Hz. Otherwise, you can audioread() to read part of an audi...

12 years ago | 0