Ameer Hamza
Hong Kong Polytechnic University
3.1416
Statistics
2 Files
Cody ThingSpeakRANK
14
of 243.015
REPUTATION
13.221
CONTRIBUTIONS
4 Questions
4.496 Answers
ANSWER ACCEPTANCE
100.0%
VOTES RECEIVED
1.299
RANK
5.937 of 16.987
REPUTATION
162
AVERAGE RATING
4.70
CONTRIBUTIONS
2 Files
DOWNLOADS
11
ALL TIME DOWNLOADS
979
CONTRIBUTIONS
0 Posts
CONTRIBUTIONS
1 Public Channel
AVERAGE RATING
30
CONTRIBUTIONS
0 Highlights
AVERAGE NO. OF LIKES
MATLAB Central Treasure Hunt finisher badge
Awarded to Ameer Hamza on 21 Sep 2020
15-year anniversary Scavenger Hunt finisher badge
Awarded to Ameer Hamza on 09 Nov 2016
Contribute at least one answer each month for 12 consecutive months
Awarded to Ameer Hamza on 02 Mar 2021
The contributor whose answers received the most acceptances in 2020
Awarded to Ameer Hamza on 01 Jan 2021
Solve all the problems in CUP Challenge
Awarded to Ameer Hamza on 17 Apr 2018
Like a problem or solution
Awarded to Ameer Hamza on 02 Jan 2018
Your submissions received 3 five star ratings
Awarded to Ameer Hamza on 19 Oct 2020
Download any 10 unique submissions
Awarded to Ameer Hamza on 01 Apr 2020
Your submissions were downloaded 30 or more times in a month
Awarded to Ameer Hamza on 01 Nov 2019
Your submission is selected as "Pick of The Week"
Awarded to Ameer Hamza on 09 Oct 2019
Publish your first review
Awarded to Ameer Hamza on 09 Oct 2019
Content Feed
Deleting Specific elemnts from Vector?
If i, j, and k are positive integers, then tm(m) = [] Read about indexing: https://www.mathworks.com/company/newsletters/artic...
7 meses ago | 0
| accepted
how to work with variables with different names in a loop?
It is never a good idea to create a variable name like this: A1, A2, ..., AN. Read here: https://www.mathworks.com/matlabcentral...
7 meses ago | 2
| accepted
Addition of numbers in array
This is one way x = [7 4 6]; y = [1 4 4]; z = sscanf(sprintf('%d',x),'%d')+sscanf(sprintf('%d',y),'%d')
7 meses ago | 0
| accepted
append sections of column by n rows to subsequent column
You can use reshape() v; % 1032x1 vector M = reshape(v, 43, [])
9 meses ago | 0
Please Help Optimization using PSO
Check the code of this FEX package: https://www.mathworks.com/matlabcentral/fileexchange/75101-non-linear-equality-and-inequalit...
9 meses ago | 0
How can I find distances between 100 points such that I have a set of distances of each point from rest of the points.
Just use pdist() function X = [..]; % create 100x3 matrix dists = pdist(X)
9 meses ago | 1
Binary value convert.
Read about logical indexing A = [0 1 0 1;1 0 0 1; 0 0 0 1; 1 0 0 1]; A(A==0) = -1;
9 meses ago | 0
| accepted
matrix arithmetic numbers short way
Yes, quite easily. A = 1:30; Read about colon operator: https://www.mathworks.com/help/matlab/ref/colon.html
9 meses ago | 0
Change the sign of column of imported file in matlab.
Something like this M_new = M.*[-1 1]; % change sign of 1st column M_new = M.*[1 -1]; % change sign of 2nd column or M_new =...
9 meses ago | 0
obtaining large numbers while using syms
Specify the number of digits in vpa() to vpa(x, 4)
9 meses ago | 0
Consider preallocating for speed
It is not an error message; it is just a warning. Pre-allocation helps make the code faster. Read my answer here to get a genera...
9 meses ago | 0
| accepted
How can increase a binary image in size by padding ?
See padarray(): https://www.mathworks.com/help/images/ref/padarray.html For example im = imread('https://www.mathworks.com/ma...
9 meses ago | 0
| accepted
finding all roots of a trignometric equation
range of tan(x) is (-inf inf), so this equation has an infinite number of solutions. Also, the solutions to this equation cannot...
9 meses ago | 0
Add elements to a matrix
Use repelem() A = [1 2 3; 4 5 6; 7 8 9] B = repelem(A, 1, 2) Note: In MATLAB [ ] are used to create arrays.
9 meses ago | 1
| accepted
Logical Indexing Within a Symbolic Array
Try this syms w1 w2 w3 w4 w5 w6 w7 w8 w9 w10 A = [0 0 0 w7 0 0; 0 0 0 0 w9 0; 0 w3 0 0 0 0; 0 0 w5 0 0 0; ...
9 meses ago | 0
| accepted
How do I replace elements in a vector with other vectors?
Don't create variable name dynamically like rectColor1, rectColor2, .. It always makes code more difficult. Following shows how ...
9 meses ago | 0
| accepted
Read STL FILE on MATLAB
No, this is not how a function is called in MATLAB. Read here: https://www.mathworks.com/help/matlab/matlab_prog/create-function...
9 meses ago | 0
| accepted
Difference between datetime values in minutes
Try this col = minutes([all_combined_short{:,1}].'-all_combined_short{1,1})+1; all_combined_short = [num2cell(col), all_combin...
9 meses ago | 2
| accepted
Placing data in a matrix
Directly use reshape() B = reshape(A, [36 353]).'
9 meses ago | 0
| accepted
How to generating surface without plotting?
Since it is a graphical object, you cannot create it without plotting somewhere. However, you can make the figure invisible so t...
9 meses ago | 0
| accepted
Calculate mean value from different matrices
How are 5 matrices available? Is it a cell array? Try something like this C = {M1, M2, M3, M4, M5}; M = cat(3, C{:}); M_mean ...
9 meses ago | 0
| accepted
Create function such that for each element of the vector it applies different function
Try something like this a = 1; b = 1; x = [2; 4]; f1 = @(x) a*x(1) + 1; f2 = @(x) b*x(2) - 1; F = @(x) [f1(x); f2(x)];...
9 meses ago | 0
| accepted
call function for each combination of rows in A and columns in B
Try this Xtrain = [1 2; 3 4; 5 6]; Xtest = [7 8 ; 9 10]; kernel = @(x1,x2) norm(x1 - x2); m = size(Xtrain, 1); n = size(X...
9 meses ago | 1
| accepted
caxis equivalent for slice plot
caxis() also works for slice(). See the difference between two figures [X,Y,Z] = meshgrid(-2:.2:2); V = X.*exp(-X.^2-Y.^2-Z.^2...
9 meses ago | 0
| accepted
How do i make this code as simple as possible? :(
First, naming variables like final_1, final_2, ... is a bad coding practise: https://www.mathworks.com/matlabcentral/answers/304...
9 meses ago | 0
| accepted
Taylor expansion calculation of exp(x^2)
The formula for taylor series is correct. Just increase the number of terms. x = -3.0:0.1:3.0; N = 12; Taylor_p2 = 0; for n ...
9 meses ago | 1
| accepted
Outputing a correspond element of another variable
Try this A = ["Bayo" "Tun" "s"]; B = [21, 45, 11]; [~, idx] = max(B); output = A(idx); Result >> output output = ...
9 meses ago | 1
| accepted
How can I interpolate a datetime data series to have an interval of 1 minute in MATLAB?
Try something like this T = readtable('sample.xlsx'); [grps, unique_mmsi] = findgroups(T.mmsi); tts = splitapply(@(la,lo,da...
9 meses ago | 1
| accepted
separet value in one colone to many colone
Try this mtx= [1 101; 2 011; 3 111; 4 110; 5 110]; cols = reshape(sprintf('%03d', mtx(:,2)), 3...
9 meses ago | 1
How to perform high-precision fitting of points on unknown trajectories? And calculate the fitting coefficient.
If you don't have the equation, then use a non-parametric curve fitting: https://www.mathworks.com/help/curvefit/nonparametric-f...
9 meses ago | 0
| accepted
