Ameer Hamza
Last seen: Today
Hong Kong Polytechnic University
4.629 total contributions since 20163.1416
Ameer Hamza's Badges
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
The contributor whose answers received the most acceptances in 2020
Awarded to Ameer Hamza on 01 Jan 2021
Contribute at least one answer each month for 6 consecutive months
Awarded to Ameer Hamza on 02 Sep 2020
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
Comment on 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 comment or rating
Awarded to Ameer Hamza on 09 Oct 2019
Publish your first submission
Awarded to Ameer Hamza on 09 Oct 2019
Accept 5 answers given by other contributors
Awarded to Ameer Hamza on 23 May 2018
append sections of column by n rows to subsequent column
You can use reshape() v; % 1032x1 vector M = reshape(v, 43, [])
14 días 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...
14 días 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)
17 días 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;
17 días 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
17 días 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 =...
18 días ago | 0
obtaining large numbers while using syms
Specify the number of digits in vpa() to vpa(x, 4)
18 días 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...
19 días 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...
19 días 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...
19 días 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.
19 días 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; ...
19 días 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 ...
19 días 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...
19 días 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...
19 días ago | 2
| accepted
Placing data in a matrix
Directly use reshape() B = reshape(A, [36 353]).'
19 días 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...
19 días 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 ...
19 días 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)];...
19 días 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...
19 días 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...
19 días 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...
20 días 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 ...
20 días 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 = ...
20 días 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...
20 días 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...
20 días 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...
20 días ago | 0
| accepted
How can I solve this complex 4 equation with 4 unknowns variables
You can specify 'MaxDegree' as input to solve() syms K1 K2 K3 K4 equ1 = K2+K4-36 equ2 = K2*K4+K3+K1-486 equ3 = K2+2*K2*K3+2*...
20 días ago | 0
Do I need to uninstall another version of MATLAB before installing an new version with different products?
MATLAB installations are independent of each other. You can delete the previous installation directory directly before installin...
20 días ago | 0
| accepted
Contour plot of XYZ data
Try this x = hfm(:,1); y = hfm(:,2); z = hfm(:,3); xg = linspace(min(x),max(x)); yg = linspace(min(y),max(y)); [Xg, Yg] ...
20 días ago | 0
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
Select web siteYou 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)