Shoaibur Rahman
Baylor College of Medicine
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Pregunta
Frequency scaling of audio signals
I have an audio signal x[n], whose frequency varies over time. It's FT is X[k]. I want to reconstruct an audio signal (x_hat[n])...
alrededor de 7 años hace | 0 respuestas | 0
0
respuestasPregunta
Inverse Fourier Transformation with a function in the exponent
I have a signal x[n] with it's Fourier Transform X[k]. I want a frequency-warped signal (x_warp[n]) by taking the inverse Fourie...
alrededor de 7 años hace | 0 respuestas | 0
0
respuestasPregunta
Shuffling a vector for n times to generate a new vector
A is a vector. I want to shuffle its elements for n times to generate a new vector. For example: A = [3 5 1]; out = [Shu...
más de 10 años hace | 1 respuesta | 0
1
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Generating a long vector from two other vectors
I got stuck with a (may be) simple problem. Here are two vectors, like: a = [20 13 24 ...]; b = [3 2 4 ...]; How can ...
más de 10 años hace | 2 respuestas | 0
2
respuestasReceiving Matrix Dimensions Do Not Agree Error
Instead of Y use Y transpose as Y' in the last line of your code. X=inv(A)*Y' However if you use the following line inst...
más de 10 años hace | 2
| aceptada
How to delete a row from a Financial Time Series?
This works here, delete rows 2 from 4: A = [1 2 3; 4 5 6; 7 8 9; 2 4 6; 1 3 5]; A(2:4,:)=[] When using your code, do ...
más de 10 años hace | 1
About 3D surface plot
a = ...your 100 x 1 x 51 data; bb = squeeze(a); surf(bb)
más de 10 años hace | 2
| aceptada
Bump --> How to change tick label fonts in Matlab figure
Here is an example on how you could use set function to accomplish your job. Delete any pairs of input arguments if not required...
más de 10 años hace | 1
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how to convert an image into bits???
It is not clear to me exactly what is your goal? Are you trying to convert image pixels into binary bits? If so, you can use dec...
más de 10 años hace | 2
Save cubic spline coefficients to use as response in regression
pp = spline(x,y); NewValue = [1 2]; % may be scaler or vector out = ppval(pp,NewValue)
más de 10 años hace | 1
Find a value with cell array.
A = your cell... out = A(cell2mat(A(:,1))==7,2)
más de 10 años hace | 1
how to calculate a serie of a function with two variables
% xi eta x =[1 2;... 3 4;... 4 5;... 6 7]; y = sum(x) % only sum of all elements alon...
más de 10 años hace | 1
How can I fill a matrix column with dta coming from another matrix according to index
A = [(1:9)' ones(9,1)]; B = [1 10; 2 10; 4 10; 7 10]; C = NaN(size(A,1),1); C(B(:,1)) = B(:,2); C = [A C]
más de 10 años hace | 1
how to find peaks in jpeg image
You can try with Mablab's findpeaks function, or see the attached code in file exchange: <http://www.mathworks.com/matlabcent...
más de 10 años hace | 1
I need to match following images
There are many sophisticated methods to do so. However, you can try with: out = ssim(TestImage,refImage) This computes t...
casi 11 años hace | 1
| aceptada
How to check two unbalanced matrix?
Another way may be: X=[1;2;3;4;5]; Y=[2]; Z = X(X==Y)
casi 11 años hace | 1
how to crop an image
I don't see any image attached. Anyway, you can try with: *roipoly* to select the image region and crop manually, or *imcrop...
casi 11 años hace | 1
how can i display a gray scale image instead of mapping 0,255 , between 0 , 127 ?
NewImage = 127*mat2gray(Image)
casi 11 años hace | 1
A simple fsolve problem from a MATLAB beginner
Define underwoodroot function separately, and call them from another m-file. In one m-file, write the following code, and sav...
casi 11 años hace | 1
| aceptada
How can convert a image from type of double(unit16) to a grayscale image?
ImageGray = mat2gray(ImageDouble);
casi 11 años hace | 1
how can i find a fuction which define input and output of a system?
Use: p = polyfit(x,y,n) % n is degree of polynomial, use a value that best fit your data To check the fitting: y_fi...
casi 11 años hace | 2
| aceptada
How to concatenate several matrices into one matrix?
Perhaps, you mistyped. It is C = [A; B] for different number of rows, but similar number of columns. Anyway, how your matrices a...
casi 11 años hace | 3
| aceptada
Multi level sorting and filtering
[~, ~, D] = xlsread('Multilevel_sorting.xlsx'); A = D(3:end,1:2); % your data in table 1 G = {'Group1','Group2','Gro...
casi 11 años hace | 1
Acceleration vs Time data into FFT
Define the number of DFT points N, and then perform the fft. N = pow2(nextpow2(length(signal))); y = fft(signal,N); ...
casi 11 años hace | 1
Recode strings in Cell array
indx = 0; for k = 1:size(codes,1) if strcmp(codes(k,1),'Home') && strcmp(codes(k,2),'5') indx = indx+1; ...
casi 11 años hace | 1
| aceptada
Solving system of nonlinear euations
syms x y [x,y] = vpasolve(x^2 + y^3 == 1, 2*x + 3*y == 4, x,y)
casi 11 años hace | 1
| aceptada
manually draw shapes (like using a pencil to draw on figure) on opened image
Try: roipoly
casi 11 años hace | 1
| aceptada
How Can I Assign variable Name?
x = 1:5; eval([datestr(date,'mmmm_dd_yyyy') '= x']); x is stored in a new variable named based on today's date. If you r...
casi 11 años hace | 1
Compound Poisson Distribution Model
I am not sure if I understand your question correctly. I guess once you get P, then you would like to choose its elements random...
casi 11 años hace | 1
| aceptada
How is this an exponential curve?
Convert your difference equation into differential equation: y(i+1) = y(i)-y(i)*h; y(i+1) - y(i) = -y(i)*h; (y(i+1) -...
casi 11 años hace | 1
| aceptada
