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Does xcorr use zero padding to negate end effects?
Hi, xcorr() does pad the DFT of the input vectors to the length 2^nextpow2(2*M-1) where M is the greater length of the tw...

environ 13 ans il y a | 0

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Can i install matlab 2012b on windows 7 32bit?
Yes, You should be able to use MATLAB R2012b with Windows 7 32 bit, please see the Windows 32-bit table at the following link ...

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issue with coefficients of Discrete wavelet transform
That is the entire vector of wavelet coefficients for the image down to the level you have specified. To create useful wavelet f...

environ 13 ans il y a | 0

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Filtering values from a curve
Sounds like you want to remove y-values greater than a certain value. One way: idx = find(y>1500); % now remove the y...

environ 13 ans il y a | 0

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wavelet transform for feature vector
Hi Jack The 2D DWT is basically a subband filtering of the image in a combination of highpass and lowpass parts. For example, at...

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How to make nonumeric x-axis values for Bar Charts
Y = [50.52 36.60 46.78 32.56]; bar(Y) set(gca,'xticklabel',{'40 feet','60 feet','120 feet'})

environ 13 ans il y a | 1

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how can I divide a vector in imaginary and real part ?
X_real = real(X); X_imag = imag(X); It's better style to write the unit imaginary as 1i, so 6+6*1i However, in y...

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What is the best way to choose 'ntw' using wavelet coherence?
NTW gives the order of a moving average filter on the wavelet coefficients so the optimum value depends really on what scales ar...

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Sum up parts of a vector?
Something like k = 1; stepsize = 288; for nn = 1:288:105210-stepsize partsum(k) = sum(vekt(nn:nn+stepsiz...

environ 13 ans il y a | 0

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what is the description of the line myFilterHandle = @myFilter;
The @ notation is for an anonymous function. It's a handle for a function presumably this function myFilter is defined somewh...

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Undefined function or method 'getCameraInfo'
Where have you saved your function getCameraInfo? Once you create the getCameraInfo.m file, you have to save it in a folder a...

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Wy error..? Need correction...
interp1 is 1-D interpolation. If you want to perform interpolation on 2-D data, see the help for interp2

environ 13 ans il y a | 0

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How can I find 4 or more character pattern in number array
See Loren's blog here: <http://blogs.mathworks.com/loren/2008/09/08/finding-patterns-in-arrays/> You can use strfind with ...

environ 13 ans il y a | 3

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how to transform images to wavwlet domain?
Walter has provided you with the correct link to category page for 2D analysis. Currently, you have to decide whether you wan...

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Problem binning data with histc()
Why do you think you can use the syntax histc(data,'Edges',edges) that is not a supported syntax. edges must be a vec...

environ 13 ans il y a | 0

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Why does my filtered time series approach zero as time approaches zero?
It's because your time series have a large mean value, which makes the start-up effects of the filter much more apparent. Be...

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How can I use the function ifft for a range of values of time?
Hi Marcia, If the velocity spectrum was obtained from the Fourier transform, then you have lost all time dependence. The Fourier...

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List all toolbox functions
If you are just interested in a listing, why not consult the alphabetical list of functions in the documentation? For example...

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Error: Undefined function or method 'gamfit' for input arguments of type 'double'
This most likely means either you do not have the Statistics Toolbox installed, or you are using a version of the Statistics Too...

environ 13 ans il y a | 0

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Amplitude Error in amplitude Spectrum of FFT
I suspect that your frequency of interest is simply not falling on a DFT bin directly. Why do you think you need to use a power ...

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How can I define a symbolic function over a specific region?
F=exp(-0.5*(X^2+Y^2)); ezsurf(F,[-2,2,-2,2]) In the above -2 <= X <= 2 and -2 <= Y <= 2

environ 13 ans il y a | 0

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How does one identify the current line being evaluated during execution?
Look at the help for dbstop For example: dbstop in FILESPEC at SUBFUN

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Warning: Imaginary parts of complex X and/or Y arguments ignored
I'm guessing from your variable, Pyy, that you are trying to plot a spectrum and f is your frequency vector. Then assuming that ...

environ 13 ans il y a | 0

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how to make histogram?
You simply hold on the plot and put both histograms on. Then you will want to modify the 'FaceColor' and possibly 'EdgeColor' pr...

environ 13 ans il y a | 1

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how to return the R-squared using lscov command
I'm not sure whether your A matrix can be interpreted as a design matrix for a linear model and B is your response vector (here ...

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How can I use string argument input as a variable name in MATLAB?
Y = randn(10,10); inputname = input('What do you want to call the matrix?\n','s'); % enter randommatrix at the comman...

environ 13 ans il y a | 0

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Signal power in Matlab
I'm surprised that you have a signal where you take the DFT, then you take the inverse DFT and the l2 norms are different, can y...

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how to define a random variable in matlab code?
That depends what you mean. Generally what you mean is that you want some way of sampling from some probability law (distribu...

environ 13 ans il y a | 0

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Error: ()-indexing must appear last in an index expression
I'm guessing you want: for i=1:n for j=1:n b1=bu{i}(j); a1=(n*b1/(m(i)*m(j))); p{i}=a1;...

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How to estimate spectral index of a time series??? Please help me
I'm assuming your equation is incorrect or you are using nonstandard notation. The power law process should be the frequency rai...

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