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Daniel kiracofe


2014 以来アクティブ

Vibration and Signal processing tutorials at http://www.mechanicalvibration.com

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  • 3 Month Streak
  • Revival Level 1
  • Knowledgeable Level 3
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could u give me weiner program to remove audio noise
Did you try typing "Wiener filter matlab" into google first? There are all kinds of examples out there. Why don't you try that ...

5年弱 前 | 0

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Store tensor history into multidimensional array
As far as I am aware, it is not possible to do what you want in matlab. There is no such thing as a 3-dimensional array literal...

5年弱 前 | 0

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Can you help me out on making the BER vs SNR plot ?
Not 100% sure of the final answer here, but based on your statement that you are only getting 1 star on the graph, I assume that...

5年弱 前 | 0

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retrieving the impulse response of a function using freqz (not impz)
I suspect your problem is that the system you are trying to study is unstable. i.e. the pole lies outside the unit circle, so t...

5年弱 前 | 0

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Faulty result on contour map
Not 100% sure what you mean by "some values are false", but I suspect that you've just transposed x and y axis. Does a = ...

約5年 前 | 0

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Error with if elseif statements
In matlab, strings are arrays of characters. Two strings with different lengths have different array dimensions. e.g. 'dog'...

約5年 前 | 0

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How do I set counter = to a value when it is a persistent variable so if i reinitialize it each time through a loop it loses it purpose?
I'm not sure if I understand the question. Here is my guess at what you are asking. If this isn't it, please restate the quest...

約5年 前 | 0

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How to use anonymous functions and fsolve to find initial conditions given final conditions (projectile motion)
So it looks like you are integrating an ODE numerically. Starting from a set initial conditions, you are doing a simple time in...

約5年 前 | 1

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How to save a huge matrix efficiently?
If you have enough memory and are using a 64 bit version of matlab, using load() to load the entire matrix into memory will be q...

約5年 前 | 0

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Using interp1 multiple times to find a root : interp1 on a matrix without loops. Using interp1 multiple times for different values of query points without loops.
My first question here would be, are you pre-allocating root? i.e. do you have root = zeros(a,b,c) before your loop? If not, t...

約5年 前 | 0

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how to plot a unit step function
Do you want to do this numerically or symbollically? With the symbolic math toolbox, the heaviside() function is a unit step....

約5年 前 | 0

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The code does not return the unwrapped phase. Why?
Not 100% sure I have the whole answer, but here's part of it. Look at these two lines side by side: %by first sequentially...

約5年 前 | 1

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Divide image into 3x3 pixels?
Depends. First, define "small" and "big". Do you mean it's okay for 10x10 but too slow for 1000x1000? Or does big mean 100,00...

約5年 前 | 0

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how to make table of ip address numbers
strsplit() will split up the strings for you. Then use sprintf() to make the formatting https://www.mathworks.com/help/matla...

約5年 前 | 0

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While loop not working
I see two issues with your code: 1) By virtue of the fact that you have "while j <9" at the top, this implies that you expect...

約5年 前 | 0

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How to round (or convert) an array to integer?
ceil() should work to round up to the nearest integer

約5年 前 | 1

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Round to specified decimal number?
this thread looks appropriate: http://www.mathworks.com/matlabcentral/answers/14495-rounding-elements-in-array-to-nearest-0-2...

約5年 前 | 0

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ploting in for loop
"there is something wrong" is pretty vague, so I'm totally guessing at what your problem is. But this seems like a reasonable gu...

約5年 前 | 0

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Why do I get this error: A(I): index out of bounds; value 2 out of bound 1 (line 13)
Because the very first time the while statement's condition is checked, n=2, and x is a vector that has 1 element. You are aski...

約5年 前 | 0

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How to determine a frequency that contains 90% of the power of the signal?
1) create a power spectrum (i.e. using the results of fft()). I'm assuming you know how to do this, if not just ask 2) create...

約5年 前 | 0

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sinewave generation:how generatea sine wave
t=0:0.001:1; freq = 10; signal = sin( freq * 2 * pi * t); plot(t, signal);

約5年 前 | 0

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HELP with creating matrix for Jacobi and Gauss-Seidel method problem!!
the brute force approach would be something like this. for i = 1:80 for j = 1:80 if (i==j) a(i,j) =...

約5年 前 | 0

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I want to copy the rows of G1 to G2 in inner for loop but error occurs , please help
the first time through the loops, k = 15. but size(G1) is 11x16. So the first time you are effectively doing G2(o,:) = G1(1...

約5年 前 | 0

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simulating a poker game
You've got a good start. Here's a few comments 1) Instead of using randsample() and then finding and removing elements from t...

約5年 前 | 4

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How to plot spectrogram in Matlab using one-year length data with the sampling rate of 50 Hz?
if you don't really need 50 Hz resolution, then use decimate() to make the vector length smaller. If you really do need 50 Hz...

約5年 前 | 0

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How to use fft2 and find spatial wavenumbers (kx & ky) ?
First, you need to reshape your data so that it is 10000x5x5 instead of 10000x25 ("reshape" command could help here). Then, a...

約5年 前 | 1

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I need to sum the values around the perimeter of a matrix, is there sum function in matlab
For your second sum, instead of sum(A(y,1:1:y)) think you wanted sum(A(x,1:1:y))

約5年 前 | 0

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Plot double Fourier series in MATLAB
I think your problem is this line A=4*(-1)^(m+n)*(sin(m.*x)*sin(n.*y))/(m*n); from the way you have written it, it looks l...

約5年 前 | 0

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Question on designing a filter to remove noise from a audio signal
step 1: analyze the signal and see if you can determine what frequencies are to be kept and what frequencies are to be discarded...

約5年 前 | 0

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2 signals to 1 channel ? use FFT
assuming that t is a vector containing time intervals, and that F1 and F2 are frequencies, and A1 and A2 are amplitudes, then I ...

約5年 前 | 0

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