Statistics
0 Questions
2.726 Answers
RANK
27
of 249.812
REPUTATION
6.538
CONTRIBUTIONS
0 Questions
2.726 Answers
ANSWER ACCEPTANCE
0.00%
VOTES RECEIVED
759
RANK
of 17.366
REPUTATION
N/A
AVERAGE RATING
0.00
CONTRIBUTIONS
0 Files
DOWNLOADS
0
ALL TIME DOWNLOADS
0
RANK
of 103.522
CONTRIBUTIONS
0 Problems
0 Solutions
SCORE
0
NUMBER OF BADGES
0
CONTRIBUTIONS
0 Posts
CONTRIBUTIONS
0 Public Channels
AVERAGE RATING
CONTRIBUTIONS
0 Highlights
AVERAGE NO. OF LIKES
Contribute at least one answer each month for 36 consecutive months
Awarded to Torsten on 12 Oct 2019
Answer 3 questions that were unanswered for more than 30 days
Awarded to Torsten on 20 Jul 2017
100 of your answers have been accepted
Awarded to Torsten on 20 Jul 2017
Provide your first answer ever to someone else's question
Awarded to Torsten on 20 Jul 2017
Content Feed
How to obtain the value of the matrix X in equation AXA' = B?
If you multiply out A*X*A' for a matrix of unknowns X=(x_ij) and compare the elements with those of the matrix B, you get an (in...
alrededor de 21 horas ago | 1
How to get certain value from matrix multiplication?
https://de.mathworks.com/help/comm/ref/gflineq.html
1 día ago | 0
find the minimum objective for a given ode as boundary value problem
Vector of unknowns for fmincon: (y1,y2,y3,y4)=(a,b,c,tend) Objective for fmincon: f(a,b,c,tend) = integral_{t=0}^{tend} c*(...
2 días ago | 0
Can one help me to find Matlab coding to convert the given matrix to a symmetric matrix by rearranging rows?
Use intlinprog or bintprog to solve min: sum_{i=1}^{n} sum_{j=1}^{n} (e_ij+) + (e_ij-) under the constraints D = P*A - (P*A)'...
2 días ago | 1
Index exceeds the number of array elements. Index must not exceed 1.
z(1)=-314; v(1)=0; h=0.1; tson=10; t=0:h:tson; L=1.5; vi=0.000001; n = 100; for i=1:n Re(i)=abs(v(i))*L/vi; Cf...
2 días ago | 0
PdeModeler App Generic System of Equations are different from those in the Manual
https://de.mathworks.com/help/pde/ug/pde.pdemodel.specifycoefficients.html#bu7pwf5
2 días ago | 0
Couette flow between two plate
Underlying equation is d^2u/dy^2 = -G/mu with G = -dp/dx = const https://en.wikipedia.org/wiki/Couette_flow function main...
4 días ago | 1
| accepted
Create random matrix (MATLAB)
Use intlinprog for the program min: 0 under the constraints sum_{i=1}^{numRows} A(i,j) = numOnesPerCol(j) (j=1,...,numCols) ...
4 días ago | 0
Find the work done for the force 𝐹⃗(x,y,z)= yz𝑖⃗ + xz 𝑗⃗ + (xy+2z) 𝑘⃗⃗ along the line segment from (1,0,-2) to (4,6,3)
https://www.youtube.com/watch?v=2OFvYo5aWXg
5 días ago | 0
| accepted
How I can determine the intersection point of two projectile
Set x1 = x2 and y1 = y2 for an intersection point of the two curves. You'll get xinter= (tan(theta2)-tan(theta1))/(g/(2*(v2*co...
5 días ago | 1
| accepted
How to find a proper algorithm to solve this optimal control problem?
This should give you a start: %Optimal advertising expenditure in monopoly %% Constants p = 100; a = 0; b = 0.07; c = 0.04...
5 días ago | 0
| accepted
Need solution for this error
First get a fid to open your file: fid = fopen( filename )
5 días ago | 0
Solving coupled Partial Differential Equations using method of Lines
For the pdepe version, better use function [pl,ql,pr,qr] = pdex2bc(zl,Cl,zr,Cr,t) Cin =[1 1 0 0]; % inital concentrations ...
6 días ago | 2
| accepted
Derivative of a function with constants
syms x a b c f = x*e^x*(a*x^2+b*x+c); df = diff(f,x)
6 días ago | 0
I want to find the five unknown of a system of five nonlinear equations. Thank you !
function main x0 = rand(5,1); x = fsolve(@fun,x0) end function res = fun(x) k1 = x(1); k2 = x(2); k3 = x(3); k4 = x(4); ...
6 días ago | 0
Errors while trying to setup equation for root finding.
function main a0 = 1; a = fzero(@fun,a0) end function res = fun(a) z_pdo = ...; k_pdo = ...; z_water = ...; ...
7 días ago | 0
Why my graph is not the same as paper!!
clear all rlength =10; %meter dx = 0.0001; Numdata = rlength/dx; %constant value Cpf=0.707; %kcal/kg.K Cpg=0.719; %kcal/kg...
7 días ago | 1
| accepted
If I have 512 matrices (entries of each matrix is looping modulo 2), how the multiplication syntax for those 512*512 matrices ?
m = 9; justRows = dec2bin(0:2^m-1)-'0'; for i = 1:size(justRows,1) A = reshape(justRows(i,:),[3,3]); M{i} = A; end
7 días ago | 0
solve four variables 1111
function main A = input('1,2;3,5'); B = input('8,-1;3,7'); C = input('2,6;8,4'); a1=A(1,1); a2=A(1,2); a3=A...
7 días ago | 1
using mat2cell
C = mat2cell(M.',ones(1,10)); % M is your 1001x10 numerical matrix
8 días ago | 0
using runge kutta RK2 on matlab
function main f = @(x,y) 5-50*y; a = 0; b = 1; n = 100; h = (b-a)/n; y(1) = 0; i = 0; for x= a:h:b-h ...
8 días ago | 0
How do I loop a fucntion over matrix columns and store the results in a column?
If R is your matrix: [m,n] = size(R); H = zeros(n,1); for i = 1:n r = R(:,i); H(i) = dfaedit(r ); end
8 días ago | 0
| accepted
Script matlab calculate vectors
syms a b c A = [a b c]; B = [-2 1 -4]; C = [1 3 2]; result = [5*a+6 3*b-2 -4*c+1]; AB = cross(A,B); AC = cross(A,C); S = ...
9 días ago | 0
| accepted
Using temperature and pressure data to estimate antoine coefficients for glycerol
antoine = @(b,T) 10.^( b(1) + b(2)./(T+b(3))); beta0 = [3.93737,1411.531,-200.566]; beta = nlinfit(T,p,antoine,beta0)
9 días ago | 1
Find the value of x when the first derivative is equal to 0
x = -pi/2:0.01:pi/2; y = cos(x); dydx = diff(y)./diff(x); [~,idx] = min(dydx.^2); xmin = (x(idx+1)+x(idx))/2 xmin is the po...
9 días ago | 0
| accepted
How to calculate numerical integral with more than 3 variables in Matlab? ( > integral3 )
Which method is best-suited depends on the specific problem. Maybe https://de.mathworks.com/matlabcentral/fileexchange/47919-i...
9 días ago | 0
| accepted
MATLAB 2010 code not working in MATLAB2012a ?
The filename must be "testingfile.m" not "TestingFile.m" Or your function must be renamed in function [z,w] = TestingFi...
9 días ago | 1
Function inside a for loop
An array of function handles is not possible. Instead, you should define s41_0 = @(a,T) a.*s_CO2(T) and evaluate it as val41...
9 días ago | 0
How can I reshape single column vector list into equally sized matrix columns
s = mod(26599,512); n = 26599 - s; m = n/512; R = horzcat(reshape(sample_test(1:n),512,m),vertcat(sample_test(n+1:end),NaN(51...
10 días ago | 0
