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

etwa 14 Jahre vor | 0

| akzeptiert

Beantwortet
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 ...

etwa 14 Jahre vor | 0

| akzeptiert

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

etwa 14 Jahre vor | 1

| akzeptiert

Beantwortet
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 ...

etwa 14 Jahre vor | 0

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

etwa 14 Jahre vor | 1

| akzeptiert

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

etwa 14 Jahre vor | 1

Beantwortet
System time Matlab
see also "clock"

etwa 14 Jahre vor | 1

Beantwortet
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...

etwa 14 Jahre vor | 0

Beantwortet
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...

etwa 14 Jahre vor | 0

Beantwortet
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...

etwa 14 Jahre vor | 0

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

etwa 14 Jahre vor | 0

Beantwortet
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 ...

etwa 14 Jahre vor | 0

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

etwa 14 Jahre vor | 0

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

etwa 14 Jahre vor | 1

| akzeptiert

Beantwortet
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...

etwa 14 Jahre vor | 0

Frage


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';... ...

etwa 14 Jahre vor | 3 Antworten | 0

3

Antworten

Beantwortet
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...

etwa 14 Jahre vor | 1

| akzeptiert

Beantwortet
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...

etwa 14 Jahre vor | 0

| akzeptiert

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

etwa 14 Jahre vor | 0

Beantwortet
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 ...

etwa 14 Jahre vor | 0

Beantwortet
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...

etwa 14 Jahre vor | 0

Beantwortet
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 =...

etwa 14 Jahre vor | 0

Beantwortet
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...

etwa 14 Jahre vor | 0

Beantwortet
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+...

etwa 14 Jahre vor | 0

Beantwortet
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...

etwa 14 Jahre vor | 0

| akzeptiert

Beantwortet
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...

etwa 14 Jahre vor | 1

Beantwortet
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...

etwa 14 Jahre vor | 0

Beantwortet
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...

etwa 14 Jahre vor | 4

Beantwortet
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...

etwa 14 Jahre vor | 1

Beantwortet
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^...

etwa 14 Jahre vor | 0

Mehr laden