Ameer Hamza
Hong Kong Polytechnic University
3.1416
Statistics
RANK
16
of 258.041
REPUTATION
13.427
CONTRIBUTIONS
4 Questions
4.496 Answers
ANSWER ACCEPTANCE
100.0%
VOTES RECEIVED
1.382
RANK
5.894 of 17.782
REPUTATION
173
AVERAGE RATING
4.70
CONTRIBUTIONS
2 Files
DOWNLOADS
12
ALL TIME DOWNLOADS
1088
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...
circa un anno 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...
oltre un anno 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')
oltre un anno ago | 0
| accepted
append sections of column by n rows to subsequent column
You can use reshape() v; % 1032x1 vector M = reshape(v, 43, [])
oltre un anno 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...
oltre un anno 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)
oltre un anno 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;
oltre un anno 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
oltre un anno 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 =...
oltre un anno ago | 0
obtaining large numbers while using syms
Specify the number of digits in vpa() to vpa(x, 4)
oltre un anno 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...
oltre un anno 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...
oltre un anno 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...
oltre un anno 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.
oltre un anno 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; ...
oltre un anno 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 ...
oltre un anno 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...
oltre un anno 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...
oltre un anno ago | 2
| accepted
Placing data in a matrix
Directly use reshape() B = reshape(A, [36 353]).'
oltre un anno 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...
oltre un anno 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 ...
oltre un anno 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)];...
oltre un anno 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...
oltre un anno 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...
oltre un anno 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...
oltre un anno 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 ...
oltre un anno 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 = ...
oltre un anno 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...
oltre un anno 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...
oltre un anno 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...
oltre un anno ago | 0
| accepted
You can also select a web site from the following list:
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)
Asia Pacific
- Australia (English)
- India (English)
- New Zealand (English)
- 中国
- 日本Japanese (日本語)
- 한국Korean (한국어)