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Fundamental of power spectral density PSD?
There is only one sine wave in this signal. There are no harmonics. Fs = 150; t = 0:1/Fs:1; x = cos(2...

대략 12년 전 | 1

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sin wave with difference sampling frequency?
Simply change the increments at which the time vector is sampled. 100 Hz sampling frequency: Fs = 100; t = 0:1/Fs:1; ...

대략 12년 전 | 2

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Using logical operators within if statement
You don't want an &, you want an or | um=input('um(Between 0 and 1) ='); if (um<0 || um>1) disp('En...

대략 12년 전 | 1

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Variable with static type possible?
To get the equivalent of a static variable in MATLAB, use persistent. When you declare a variable to be persistent within a func...

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How to interpret an answer given by the "regress" function
Your design matrix should be 60x5, not 60x4, you need a column of ones for the constant term, a0. So start by doing the follo...

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Fundamental of power spectral density PSD?
The answer is you are only seeing one peak in your signal. When you obtain a two-sided (negative and positive frequencies) PSD e...

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Undefined function 'times' for input arguments of type 'struct'.
I think you need to show us how you are forming your variables m and c - is either one or both a structure array? They clearl...

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Fundamental of power spectral density PSD?
Are these two peaks harmonically related? In other words, is the second peak an integer multiple of the first peak. In that case...

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Testing for Linear Dependence (Matrix Errors when running)
A rectangular matrix cannot have a true inverse. How about just A = [2 3 0; 1 2 0]; rref(A) To get the reduced row e...

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How to change CELL components value?
A = cell(2,1); A{1} = randn(100,1); A{2} = randn(100,1); A{1} = A{1}/2; A{2} = A{2}/2; Or if you ...

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AI toolboxes in MATLAB
AI is a big area, so how are you defining what qualifies as an AI toolbox? For example: <http://www.mathworks.com/products...

대략 12년 전 | 1

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Splitting up a matrix into X sizes/ based on specified values in a matrix
Are the time instants just integers? If not, that may be why find() does not work depending on how you are using it. X = one...

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How can I use wavelet thresholding with nondecimated 2D decomposition of an MR image ?
You want to use sw2dtool >>sw2dtool Interactively play with your denoising and then select File -> Generate MATLAB Co...

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Three-level Daubechies wavelet transform?
Have you tried this using >>dw2dtool That will allow you to interactively do exactly what you want

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how to make bandstop filter
You have the sampling frequency specified as 44100 Hz. Is that correct? If that is correct how can you have a stopband [299740,2...

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I have designed triplet half-band filer bank. I have got the co-efficients. Can any one help me design wavelet using these co-efficients using MATLAB???
When you say triplet half-band filter bank are you talking about a frame filter bank with one lowpass and two highpass filters. ...

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diary fuction is not working, what can i do ?
It seems you are trying to execute that command in a folder where you don't write permission. Can you cd to a folder where yo...

대략 12년 전 | 1

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How to combine the text from two edit text and making it as one text?
X= 'TR-13-01639(16)'; Y = '102489473-16*'; idx = find(X=='('); X(idx:end) = []; keyword = strcat(X,'...

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Matrix (Resultant from an Expression) Indexing
Yes A = randn(20,10); size(A,2) size(A,1) So N = size(A,2); Did you read the help?

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problem with sum command
You must have a variable in your workspace called sum, which is a bad idea. Make sure that your program or script does not cr...

대략 12년 전 | 2

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How to increment a variable
How about just a = a+1; a = 1; x = zeros(10,1); for k = 1:10; x(a)= k^2; a = a+1; end Of course, you would nev...

대략 12년 전 | 3

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How to extract Sound Pressure Level[SPL] data from an audio file(*.wav)
You cannot do that unless you have some detailed information about how the .wav file was recorded. You need to know how to creat...

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How can I make a conditional statement when using variables?
I'm guessing from the error message you report that x is a vector, not a scalar. From the code snippet you show, both a and b ar...

대략 12년 전 | 0

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plot sin function with sincommand
How about just using sinc() if you have the Signal Processing Toolbox. If not x = linspace(-5,5); y = sin(pi*x...

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How to invert a 72x72 symbolic matrix?
What is the performance of linsolve() for symbolic expressions? I haven't tried it for such a big matrix, but have you tried tha...

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How to combine the text from two edit text and making it as one text?
Can you show us what your output X and Y look like? Have you tried strcat()? X = 'C:\temp'; Y = 'data' ...

대략 12년 전 | 1

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Splitting a fouriertransform in low, middle and high frequency intervals
The key is to figure out the frequency spacing in the DFT, that uses simply what you are calling FFT = 2^nextpow2(L); a...

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How to work on fprintf in fopen?
What is msg? That is the system-dependent error message returned by fopen. I'm assuming the value of txt is -1 meaning the fopen...

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find a basis and dimension for the subspace
V1 = [1;2;1;-1]; V2 = [3;1;0;5]; V3 = [0;5;3;-8]; V = [V1 V2 V3]; rank(X) The rank of the matrix is 2 mea...

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i have a big matrix with dimension 303*14 i want compare every row of this matrix with one vector with dimension 1*14
I'm not sure I understand, you say you have a cell array: strcmp() does work element by element on a cell array. A = {'T...

대략 12년 전 | 0