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# Shoaibur Rahman

### Baylor College of Medicine

Active since 2014

Specialities: Systems Neuroscience, Machine Learning, Data Science, Statistical Inference, Signal Processing, and Image Processing

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Question

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])...

nästan 4 år ago | 0 answers | 0

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Question

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...

nästan 4 år ago | 0 answers | 0

### 0

Submitted

Exclude elements from array or matrix
Exclude elements from array, and rows or columns from matrix

Submitted

Customize plot graphics
Set custom graphics to plot

Submitted

Shuffle a vector for multiple times and concatenate them
Shuffle a vector for multiple times and concatenate them

Submitted

Calculate R-squared value
Calculation of r-squred value

Submitted

Vertical line on a figure
Vertical Line in Matlab

Submitted

Horizontal line on a figure
Horizontal Line in Matlab

Submitted

Find peaks (maxima and minima) of a function
This function detects the transition points (maxima and minima) in a function like y = f(x)

Submitted

A single title on top of a subplot
Use this function to print a title on the top of a group of subplots

Submitted

General Linear Regression Model
Generalized form of single and multivariate regression model (linear and non-linear)

Question

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...

nästan 7 år ago | 1 answer | 0

### 1

Question

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 ...

nästan 7 år ago | 2 answers | 0

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Receiving 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...

ungefär 7 år ago | 2

| accepted

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 ...

ungefär 7 år ago | 1

Solved

Determine if input is odd
Given the input n, return true if n is odd or false if n is even.

ungefär 7 år ago

a = ...your 100 x 1 x 51 data; bb = squeeze(a); surf(bb)

ungefär 7 år ago | 2

| accepted

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...

ungefär 7 år ago | 1

| accepted

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...

ungefär 7 år ago | 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)

ungefär 7 år ago | 1

Find a value with cell array.
A = your cell... out = A(cell2mat(A(:,1))==7,2)

ungefär 7 år ago | 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...

ungefär 7 år ago | 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]

mer än 7 år ago | 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...

mer än 7 år ago | 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...

mer än 7 år ago | 1

| accepted

How to check two unbalanced matrix?
Another way may be: X=[1;2;3;4;5]; Y=[2]; Z = X(X==Y)

mer än 7 år ago | 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...

mer än 7 år ago | 1

how can i display a gray scale image instead of mapping 0,255 , between 0 , 127 ?
NewImage = 127*mat2gray(Image)

mer än 7 år ago | 1