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representation of array
Like this example? >> T = 0 : 0.01 : 0.05 T = 0 0.0100 0.0200 0.0300 0.0400 0.0500 >> ...

casi 15 años hace | 0

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Can't sort this code
You define fnj as MxN, but in your for loop you are assigning values to fnj(j,n) where: j = 1 : N and n = 1 : M ...

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Respondida
FFT function code from YouTube not working
Did you mean: X = X(1:cutOff);

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Respondida
How do I draw a solid cylinder ?/
There probably exists a better way to do this, but: D = 5; % Diameter H = 10; % Height A = 360; % Angles to plot ...

casi 15 años hace | 0

Respondida
Help with code needed - sampling
One change to make: An <= xj <= (An+1) should be split up (An <= xj) && (xj <= (An+1))

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popupmenu in GUI
temp_cellstr = {'choice 1';'choice 2';'choice 3'}; set(handles.your_popup_name,'String',temp_cellstr); Or you can open the...

casi 15 años hace | 1

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System time Matlab
see also "clock"

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How to rename filenames quickly?
Using a trick I recently learned, after you have used the info in Sean's link to determine and store the names of the files in a...

casi 15 años hace | 0

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fft/ifft transform of 2d matrix
If you want an idea of what is going on behind the scenes of fft2, then you can check out my answer here: <http://www.mathwor...

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code of trace path
In this version, there is a check that will modify the possible path directions based on whether the row/col it can move to alre...

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Writing program to evaluate a polynomial at point x=c
reverse your a, a = [an ... a1 a0]

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code of trace path
Not entirely clear on an acceptable result, but if this is an example of an acceptable result: 1 1 1 0 0 1 0 0 ...

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Searching for specific maxima
Next idea, instead of envelope of Freq we replace any negative (or really small) frequencies with linear interpolation of positi...

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font size setting
Look for "Preferences" > "Fonts" in your menu

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Sort cell strings according to specific subsets of those cell strings
Here is the clunky version I have been using: numFiles = numel(filename); sortcell = {''}; sortind = zeros(n...

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Pregunta

Sort cell strings according to specific subsets of those cell strings
Let's say I have a cell string with values: filename = {'2009.272.17.57.23.8445.AZ.SMER..BHE.R.SAC';... ...

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respuestas

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detect nth character in a string
If you want the result to also be a string, then: b = a(2:3); If you want the result to be a number, then: b = str2...

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Inequality problem
You have to split them up... instead of: A < X < B you have to do: (A < X) && (X < B) Incidentally, make sure yo...

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Least square polynomial fit
Check out "polyfit", "polyval" and "max" - polyfit will give you the polynomial coefficients for an n-order polynomial - p...

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fft error: Not enough input arguments.
When you run the function as "homFreq" (with no input arguments) from the command line (or from the editor) you aren't defining ...

casi 15 años hace | 0

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Fourier-Frequency analyse
You need to make a few changes: If, dt = 0.0001; t = 0:dt:(0.05-dt); N = length(t); y_time = square(5*pi*50*t); Th...

casi 15 años hace | 0

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Searching for specific maxima
Similar to andrei: A = [1 2 1 2 3 2 3 4 122 120 3 4 5 3 51 4 2] [pks,locs] = findpeaks(A) maxpks = max(pks); threshold =...

casi 15 años hace | 0

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Find what toolboxes a script uses
Also, see this answer: <http://www.mathworks.com/matlabcentral/answers/25958-how-to-list-functions-toolboxes-required-by-a-progr...

casi 15 años hace | 0

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FFT of a signal based on simulation data
A couple of helpful tips: ti = 0 : 0.01 : 39; Will do the same thing as: ti = []; j=1; for i=1:0.01:40; ti(j) = i-1; j=j+...

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FFT of a signal based on simulation data
I usually do: df = fs / N; Nyq = fs / 2; f = -Nyq : df : Nyq-df; plot(f , abs(fftshift(Y))); But that looks like the same th...

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How to compute the fourier transform for a signal u(t) over frequency band [-10,10]?
Say you have the following: N = 1024; % Number of samples dt = 0.01; % Seconds per sample u_time = randn(1,N); Then, you wo...

casi 15 años hace | 1

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Pseudo Inverse Matrix
If you have the following situation: G*m = d where, G = (MxN) % Known m = (NxP) % Unknown d = (MxP) % Known Then to find...

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Finding the velocity from displacement
This is a function I wrote to convert seismograms from one domain to another: function dataout = iomega(datain, dt, datain...

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Chirp generation
As Walter says, this will not give you a true chirp signal. If you are aware of this and would still like to have a pseudo-chirp...

casi 15 años hace | 1

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Counting zeros
I know you don't need to find the roots explicitly, but this will work: p = [1 -6 -72 -27]; % polynomial coeffs for f(x) = x^...

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