Bruno Luong
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Awarded to Bruno Luong on 25 Jan 2012
How to correctly calculate the angle between two planes?
One time I get 2.68555450304481 and if I change the order of input I get 0.456276904837795 !! What am I missing? Isn't an angl...
alrededor de 4 horas ago | 0
How to find volume under 2D data?
% Generate some fake data, replace r with your X and y with your Y vector % you need to peak either side r >= 0 or r <= 0 NOT b...
alrededor de 5 horas ago | 0
Vectorization of while loop
meanValue = 10; devValue = 1; numValues = 1000000; presumption = 2; tic % Function from here https://www.mathworks.com/...
alrededor de 12 horas ago | 0
| accepted
Create random graph with limited degree
n = 10; % number of nodes maxDeg = 4; M=rand(n); M=0.5*(M+M'); S1=sort(M,1,'descend'); S2=sort(M,2,'descend'); T=max(S1(...
3 días ago | 0
| accepted
Remove array values with multiple occurances from "parent" array
Test samples a = [1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4] b = [1, 1, 2, 4, 4, 4] Code u = unique([a,b]); n = length(u); [~, ia...
6 días ago | 0
Create all unique combination with a vector array
Try this, no redundancy created. However the number of combinations still grow very quick so be awared. Where as it gives the or...
7 días ago | 0
Does anyone know how to use the matlab to calculate the minimu distance between a point outside oval and the oval surface？
Checkout this FEX https://www.mathworks.com/matlabcentral/fileexchange/27711-euclidian-projection-on-ellipsoid-and-conic
11 días ago | 1
Submitted
Distance bewteen 2 cylinders in 3D
Compute the distances between 2 cylinders in 3D as well as the closest points
7 meses ago | 1 download |
Question
select cameratoolbar by axes
When using standard zoom/pan/rotate3D we can disable the axes that would not under the interaction with user by setAllowAxesZoo...
8 meses ago | 0 answers | 0
0
answersModular arithmetic for encryption
"1/2" is integer (let us call it "a") so that a*2 = 1 mod 29 This can be obtained by GCD function >> [~,a]=gcd(2,29) a = ...
8 meses ago | 1
| accepted
Bug with conv2
The answer is correct. May be you expect the result with sliding sum with unflip kernel which is of course wrong.
9 meses ago | 1
How to replace for loop with vectorization?
[iii,jj]=ndgrid(ii,1:size(res,2)); v=accumarray([iii(:) jj(:)], res(:))
9 meses ago | 1
Generate a random matrix without repeating any value in row and column.
A=mod((0:3)+(0:3)',4)+1; R=A(randperm(end),randperm(end))
9 meses ago | 0
| accepted
Getting back the solution to Ax=b after reordering A
This is correct: clc clear close all A=[4 1 2 0.5 2;1 0.5 0 0 0;2 0 3 0 0;0.5 0 0 5/8 0;2 0 0 0 16]; % P_amd=amd(A); P_amd...
9 meses ago | 0
how can i generate the random numbers for specific probabilites
v = [ 0, 15, 25, 35, 45, 20]; % values P = [0.01, 0.15, 0.20, 0.50, 0.12, 0.02]; % the correspond probability c ...
9 meses ago | 0
| accepted
combination and their sum
A = [4 2; 5 7; 3 1] m = size(A,1); b = dec2bin(0:2^m-1,m)-'0'; C = A((1:m)+m*b).' Result (each column is a co...
9 meses ago | 0
How to calculate determinant of matrices without loop?
a(:,1).*b(:,2)-a(:,2).*b(:,1)-a(:,1).*b(:,3)+a(:,3).*b(:,1)+a(:,2).*b(:,3)-a(:,3).*b(:,2)
9 meses ago | 1
| accepted
Equality constraint in quadratic programming
Yes, il looks right to me. EDIT: No Q(3,1) must be 0 Q=[2 1 0; 1 4 0 ; 0 0 6]
9 meses ago | 0
| accepted
Find matching points from two coordinate systems
Look for the literature of image registration. For simple rotation/scaling/translation you can use Matt J's submission For mo...
9 meses ago | 0
How vectorize this operation
n=10 m=3 x=rand(n,1) y=rand(m,1) % your method z = nan(length(x),1);% Just some fake data to define the size of z. could ...
9 meses ago | 1
| accepted
Solve Overdetermined Linear System
For overdetermined system the "\" returns least-square solution, meaning it doesn't solve exactly your system, but returnes the ...
9 meses ago | 0
How to remove duplicates in matrix with condition
X = [1 10;2 20;3 30;3 31;3 32]; Xs=sortrows(X); [~,I]=unique(Xs(:,1),'last'); XResult = Xs(I,:)
9 meses ago | 1
| accepted
How to taker power of a permutaion matrix
You have 2 ways to compute it, from the permutation itself, or using the permutation matrix then raise a power of it. % Generat...
10 meses ago | 0
| accepted
How to design a Toeplitz matrix with negative lower triangle elements and zero main diagonal elements
toeplitz(0:-1:-5,0:5)
10 meses ago | 1
| accepted
How to define a covariance matrix that is positive semi definite?
L=randn(3); sigma=L'*L
10 meses ago | 0
Question
path of a mfile not on search path
When an mfile is not on the search path or current path and when user types the name, MATLAB find it and issues a suggestion >>...
10 meses ago | 2 answers | 0
2
answersHow to generate a random data vector that follows a constraint
This will generate uniform distribution (within to polytope) N = 10; Etotal = 0; E = -log(rand(N+1,1)); E = E(1:N,:)./sum(...
10 meses ago | 2
| accepted
Increasing Java Heap Memory of target machine so that EXE runs on target machine with MCR
According to my test, the stand alone app uses the sames amount of java heap memory than your MATLAB preferences. To set the a...
10 meses ago | 0
| accepted
Model of a crowd on concert venue or how to distribute random points according to the 2D window distribution
Torsten's rejection might bias the distribution. One of the better approach is to repell the points when they are close to each...
10 meses ago | 0
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