Respondida
Where is the list of all possible MATLAB toolboxes can be found?
Hi Steve, please see this link <http://www.mathworks.com/products/index.html?s_tid=hp_fp_viewall MathWorks Products>

más de 12 años hace | 2

| aceptada

Respondida
Normalized Cross correlation, Normalized autocorrelation
If you have the Signal Processing Toolbox, use xcorr(). I'll assume your -GolaySec above is a typo and should read -Golayseq ...

más de 12 años hace | 0

Respondida
Why is the formatting of my MATLAB documentation broken?
Hi Otto, if you look in your matlab/help directory, do you see the following files? basecodes.properties docstyle1.css ...

más de 12 años hace | 0

Respondida
out of memory with [c,s]=wavedec2()
Are you saying that wavedec2() throws a memory error on a single call with a 512x512? For example, this does not cause a memo...

más de 12 años hace | 0

Respondida
how to determine a period for sinewave
You can use fft() as one way. Here's an example with a 100-Hz sine wave (sampled at 1 kHz). Fs = 1000; % sampling ra...

más de 12 años hace | 1

Respondida
What is multiresolution direction fiterbank
Professor Do has MATLAB software available for this: <http://www.ifp.illinois.edu/~minhdo/software/ Minh N. Do: Software> ...

más de 12 años hace | 0

Respondida
Going from the time doain to the frequncy domain, why the amplitude of the signal is increased?
You're missing the scaling of the fft() output by the length of the input signal. That is likely the biggest contributor to why ...

más de 12 años hace | 0

Respondida
How to define a function to run a particular .m file
You can simply call a defined function inside of another function. As long as both are on the MATLAB path. If the user pass...

más de 12 años hace | 0

Respondida
How to choose 2 people randomly among 12 ?
Group={'ae','bk','cn','es','fh','hv','mh','ol','sd','sg','ss','ts'}; idx = randperm(12,2); ind = setdiff(1:lengt...

más de 12 años hace | 0

Respondida
Remove redundancy values from matrix
S=[2 3 4 5 4 4 4;2 3 4 2 3 4 5;3 4 4 5 5 2 3]; S1 = unique(S);

más de 12 años hace | 0

| aceptada

Respondida
implementing a "first difference" filter in Matlab defined by a difference equation.
No, I just mean filter(). A causal N-point moving average filter just has filter coefficients of 1/N b = 1/N*ones(N,1...

más de 12 años hace | 1

Respondida
How to choose 2 people randomly among 12 ?
Group={'ae','bk','cn','es','fh','hv','mh','ol','sd','sg','ss','ts'}; idx = randperm(12,2); Group{idx} I think you wa...

más de 12 años hace | 0

| aceptada

Respondida
implementing a "first difference" filter in Matlab defined by a difference equation.
Why do you believe it's a second order difference equation? Since it is a homework problem, I do not want to simply give you ...

más de 12 años hace | 0

Respondida
Finding peaks in a data set
I would first ensure you are using MathWorks' findpeaks(). If you enter >>which findpeaks do you get something back like...

más de 12 años hace | 0

Respondida
How is it possible to tell if systems are linear, non-linear or time-invariant?
This is not a MATLAB question. You can simply tell in these cases by checking whether the operator satisfies the superposition a...

más de 12 años hace | 0

| aceptada

Respondida
Extracting Spatial frequency from fourier transform (fft2 on Images)
If you have a simple 2-D complex exponential x = 0:159; y = 0:159; [X,Y] = meshgrid(x,y); Z = exp(1i*pi/4*(X+Y)); ...

más de 12 años hace | 1

Respondida
matrix transformation to make the values of second row to be lower to higher
I'm not sure I quite understand what you're doing from your description, but D = [0.3,0.5,0.2;0.3,-0.1,0.7]; [...

más de 12 años hace | 0

| aceptada

Respondida
How to integrate two columns of data in MAT LAB
Since you are on an older release, how about using dblquad() instead?

más de 12 años hace | 0

Respondida
How Can i Produce a Random mxn Matrix, with pre -specified set of integers?!
X = randi([0 1],20,20); X(X==0) = -1;

más de 12 años hace | 0

| aceptada

Respondida
Why does periodogram varies with data length?
In R2012a, you can use spectrum.periodogram and then msspectrum Fs = 1000; t = 0:1/Fs:2-1/Fs; x = 0.5*cos...

más de 12 años hace | 0

Respondida
How to add AWGN white noise in a 2d vector
I think you should try casting the mixd_ocr matrix to double. mixd_ocr = double(mixd_ocr); If you execute clas...

más de 12 años hace | 1

| aceptada

Respondida
Why does periodogram varies with data length?
Because the periodogram is strictly a PSD estimate unless you specify the 'power' option. By doubling the time interval you are ...

más de 12 años hace | 0

| aceptada

Respondida
FFT amplitude scaling - sample frequency/sampling period, number of input samples, transform length, or none of the above?
Do you have the Signal Processing Toolbox in 13a or 13b? If so, then use periodogram() with the 'power' option. That will do thi...

más de 12 años hace | 0

Respondida
finding mse and hence quantifying the quality of an image
The Wavelet Toolbox has a function for this measerr(), but it's easy enough to do. Suppose that X is your image and Xapp is the ...

más de 12 años hace | 0

Respondida
Undefined function or method 'som_read_data' for input arguments of type 'char'.
Did you make sure that you added the directories for the SOM Toolbox to your MATLAB path? You can use pathtool() to add them....

más de 12 años hace | 0

| aceptada

Respondida
Difference between spearmann correlation and fit command
I would not put any faith in the correlation coefficient, the p-value is 0.9 and the reported rho is close to 0.

más de 12 años hace | 0

Respondida
If I have a periodic function piecewise, I could calculate THD Total Harmonic Distortion for it?
The Signal Processing Toolbox has a function that will do that for you, thd() thd() is new in R2013b.

más de 12 años hace | 0

| aceptada

Respondida
How do I view the format of a sample data in matlab e.g. "load readmissiontimes" (survival analysis)
The variables in that .mat file are: Age 100x1 800 double Censored ...

más de 12 años hace | 0

| aceptada

Respondida
Error message when using plot command: "Subscript indices must either be real positive integers or logicals"
The above code should execute properly Kelsey. Perhaps you have a variable named linspace() in your workspace? If you execute...

más de 12 años hace | 0

Respondida
Replacing values within a row of matrix with a vector?
There are a number of ways a = [ 1 0 1 0;... 1 1 0 1;... 0 1 1 0;... 1 1 0 0]; ...

más de 12 años hace | 0

| aceptada