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Ridwan Alam


Last seen: 10 dagar ago
130 total contributions since 2019

Ridwan Alam's Badges

  • 3 Month Streak
  • Knowledgeable Level 3
  • First Submission
  • GitHub Submissions Level 1
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Answered
how to generate point of two intersected spheres
If you have the points on the spheres as well as the intersection region, you can follow this link to plot the point clouds: ht...

ungefär en månad ago | 0

Answered
Time Series Forecasting Using Deep Learning (LSTM)
Yes. Please follow the examples here: https://www.mathworks.com/help/deeplearning/ref/nnet.cnn.layer.sequenceinputlayer.html h...

ungefär en månad ago | 0

Answered
Perform FFT from imported excel data. Help please
Signal = D(:,2); RD = str2double(R) is making a matrix of NaNs. So, you can use D instead of R.

ungefär en månad ago | 0

Answered
find a set of data in an array
idx = find(A~=0); B = A(idx); idx and B have the same size and order. I believe this is what you are looking for?

2 månader ago | 0

Answered
How can I select rows in an array based on the values in the first column of another array?
new_array = second_array(first_array,:)

2 månader ago | 1

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Answered
adding different number of columns to specific row
Try using the table join() method: https://www.mathworks.com/help/matlab/ref/table.join.html Example: M_obs = readtable('book...

2 månader ago | 0

Answered
How to display all values of an iteration?
for i = 1:100 xc = (x1 + x2)/2; if f(x1)*f(xc)<0 x2 = xc; else x1 = xc; end disp(['x1...

2 månader ago | 0

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Answered
How to replace a rectangle with another rectangle?
I tried this, it worked for me: r = rectangle('FaceColor', [0.2 0.2 0.7]); r.FaceColor = [0.2 0.2 0.2];

2 månader ago | 0

Answered
Changing array size of user input data
myCell = {}; k = 0; for i = 1:5:number k = k + 1; myCell{k,1} = i:min(i+4,number); end writecell(myCell,fullfile(...

2 månader ago | 0

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Answered
Problem with function handle for Basis function in fitrgp
load(fullfile(matlabroot,'examples','stats','gprdata2.mat')) In this case, your x is n x 1; hfcn returns H, which has size n ...

2 månader ago | 0

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Answered
Errors using function and fsolve
% *Set universal constants:* global surr sink sigma sigma = 5.67e-8; % Stefan-Boltzmann constant (in W/m^2/K^4) % % *S...

3 månader ago | 0

Answered
Linear regression outputs (regstat function)
The first one is for the constant coefficient (aka intercept term). I believe you have only one predictor x, then your model is...

3 månader ago | 0

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Answered
T-wave on ECG
If I understood right what you are asking, you need to find the peaks for P,Q,R,S, and T using findpeaks(). https://www.mathwo...

3 månader ago | 0

Answered
making dataset 3D data function
Let's assume your variables are named as 'input01', 'input02', ... 'input48'. my3Ddata = []; myMeanData = []; varnames = wh...

3 månader ago | 0

Answered
How can I save a image from imshow into a cell array ?
I don't think you need the imshow(). imshow() is only used to show the image, and it returns an image object, which is not norma...

3 månader ago | 0

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Answered
Piecewise function of y
It's a bit hard to understand the issue here. Please let me know if this is not what you are looking for: plot(C2(20:90), heigh...

3 månader ago | 0

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Answered
Replacing NaN with blanks in a matrix
I believe you are looking for fillmissing() or rmmissing(): https://www.mathworks.com/help/matlab/ref/fillmissing.html https:/...

3 månader ago | 0

Answered
linear regression of time series with time index
If you have a fixed equation like the one provided, I believe you are looking for parameter estimation methods to find beta_0, b...

3 månader ago | 0

Answered
please explain the solution
K = round(Tuq'*eye(5)*Tuq,2); M = [ m 0 0 ; 0 m 0 ; 0 0 I ]; eq = det(K*k-w1*M); s = solve(eq,w1); will prevent sym() to con...

3 månader ago | 0

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Answered
FFT filter on voice file help please
There are multiple ways you can filter these data. You can use bandpass, high or low pass filters, or any other specific filters...

4 månader ago | 0

Answered
Fourier Transform in Simulink
Change the Samples per frame property on the Sine Wave block: https://www.mathworks.com/help/dsp/ug/transform-time-domain-d...

4 månader ago | 0

Answered
Digital signal processing LINEAR AND CIRCULAR CONVOLUTION length-N sequences error
x = [2+3j 3-1j -1+2j 3j 2+4j]; https://www.mathworks.com/help/matlab/ref/j.html

4 månader ago | 0

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Answered
How to detect variations in data?
Depends on how complex of a solution you are looking for. There are algorithms for change point detection that you can try. htt...

4 månader ago | 1

Answered
Which Right Eigenvector to report?
I assume you meant 'right' as opposed to 'left' eigen vectors. [V,D] = eig(A); % to get left eigenvectors, [V,D,W] = eig(A), he...

4 månader ago | 0

Answered
Creating a table for the "For-loop command" results:
Even though there are many more efficient ways to do this, this is a simple addition to your code: clear clc n=input('Enter t...

4 månader ago | 0

Answered
How to extract sub-matrices from a big matrix?
% to find the matched date and store the that day along with the following 5 days (120 hours) in another matrix. for n = 1:siz...

4 månader ago | 1

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Answered
How to change nonzero values to 1 within a table?
tempTable = table2array(myTable); tempTable(tempTable~=0)=1; myTable = array2table(tempTable);

4 månader ago | 0

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Answered
Replace NaN's in a table - I need some help
T2.col1(ismissing(T2.col1)) = "Behezad"; T2.col2(ismissing(T2.col2)) = "RAD"; T2.col3(ismissing(T2.col3)) = "MORD";

4 månader ago | 1

Answered
Adding values of Columns in a matrix to create another matrix (for loop)
dim=size(E_min,2); % dim = 25 fun = @(E) A*exp(-E/kT); Np = []; nyi = []; for i = 1:dim Np(i)=integral...

4 månader ago | 1

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Answered
How to mark a specific point on CDF graph?
Assuming you have 4 cdf arrays, you can find the x-values as: cdf1ind = find(cdf1>=.80,1,'first'); x1 = x(cdf1ind); cdf2ind = ...

4 månader ago | 0

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