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

circa 14 anni fa | 0

| accettato

Risposto
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 ...

circa 14 anni fa | 0

| accettato

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

circa 14 anni fa | 1

| accettato

Risposto
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 ...

circa 14 anni fa | 0

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

circa 14 anni fa | 1

| accettato

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

circa 14 anni fa | 1

Risposto
System time Matlab
see also "clock"

circa 14 anni fa | 1

Risposto
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...

circa 14 anni fa | 0

Risposto
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...

circa 14 anni fa | 0

Risposto
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...

circa 14 anni fa | 0

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

circa 14 anni fa | 0

Risposto
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 ...

circa 14 anni fa | 0

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

circa 14 anni fa | 0

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

circa 14 anni fa | 1

| accettato

Risposto
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...

circa 14 anni fa | 0

Domanda

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';... ...

circa 14 anni fa | 3 risposte | 0

3

risposte

Risposto
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...

circa 14 anni fa | 1

| accettato

Risposto
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...

circa 14 anni fa | 0

| accettato

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

circa 14 anni fa | 0

Risposto
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 ...

circa 14 anni fa | 0

Risposto
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...

circa 14 anni fa | 0

Risposto
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 =...

circa 14 anni fa | 0

Risposto
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...

circa 14 anni fa | 0

Risposto
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+...

circa 14 anni fa | 0

Risposto
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...

circa 14 anni fa | 0

| accettato

Risposto
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...

circa 14 anni fa | 1

Risposto
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...

circa 14 anni fa | 0

Risposto
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...

circa 14 anni fa | 4

Risposto
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...

circa 14 anni fa | 1

Risposto
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^...

circa 14 anni fa | 0