Community Profile # Torsten

Last seen: Today 2013년부터 활동

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GPS user position loop , problem with matrix is singular
I think you forgot to close the k-loop before the definition of H. What is the matrix A ? It's not defined in your code.

약 2시간 전 | 0

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Optimization single nonlinear equation to fit predicted data to actual data
"nonlcon" as the nonlinear constraint function from "fmincon" can constrain a*p1(i)^w * p2(i)^y * p3(i)^z as well, if this is wh...

약 2시간 전 | 0

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Defining objective functions appropriately
Usually, you maximize the corresponding log-likelihood function. So it's a maximization problem. To maximize, use one of MATLA...

약 8시간 전 | 0

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Global fitting two functions with shared parameters and variable, which fits two different data sets, respectively
Two data sets Adata and Bdata which are physically different properties and has values that are completely different in digits (...

약 19시간 전 | 1

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Plot Population growth function with different values of b using for loop
f = @(t,b,d,N0) N0*exp((b-d)*t); t = 0:0.1:10; N0 = 400; b = [0.1 0.001].'; d = 0.001; plot(t,f(t,b,d,N0)) grid on

약 20시간 전 | 0

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Maximum perpendicular distance between lines
x = [120 150 180 210 240 270 300 330 360]; % power y= [ 1.4000 1.3000 1.3000 1.4000 1.7000 2.400...

약 23시간 전 | 0

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fzero with two variables and an array of elements in a loop
p.V1=1e-7; AA=@(y,T) 4e17.*exp(-25619./T).*(y-0.02).^2./(0.2-y).^3; BB=@(y,z,T) 5e7.*(0.6+2e-5.*T.*log(AA(y,T)./A(z,T))+1.154....

1일 전 | 0

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OPTIMIZATION BY GA toolbox

1일 전 | 0

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How do I get point between two high dimensional points?
0.5*(x1+x2) or in general: (1-lambda)*x1 + lambda*x2 for 0<=lambda<=1.

1일 전 | 0

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Avoid evaluation in vectorised conditional expressions
If your right-hand side contains expressions with x, you must replace x by x(idx1) resp. x(idx2).

2일 전 | 1

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How to reorientate the orientation of a mobile robot to a specific angle.
You mean change orientation_old = [2*pi*rand(1),0] to orientation_new = fliplr(orientation_old) ?

2일 전 | 0

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How to integrate a lognormal pdf
Use "logncdf" with the parameter values from "fitdist" and the input values xi1.

2일 전 | 1

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bvp4c for coupled interface boundary conditions
Read this carefully, and you will know how to set up your problem: https://de.mathworks.com/help/matlab/math/solve-bvp-with-mul...

2일 전 | 0

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How to check whether point is inside high dimensional convex hull?
https://de.mathworks.com/matlabcentral/fileexchange/10226-inhull

2일 전 | 1

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Obtaining a matrix of solutions with fsolve
Don't solve for all x values at once. Call "fsolve" in a loop and solve for each pair of combinations for (c1,c2,c3,c4) separa...

2일 전 | 1

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pdepe coupled boundary conditions
pl = pr = 0, ql = qr = 1 for both components u1 and u2. What's the problem ?

2일 전 | 0

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define a function in terms of an integral with variable limits
f1=@(t)3+2*cos(2*pi*t); f2=@(t)4-3*sin(2*pi*t); ff=@(t)-f1(t)-f2(t); gg=@(u,t)integral(ff,u,t); ww = @(u,t)f1(t).*exp(gg(u,t...

3일 전 | 0

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How can I improve the efficiency of an equation with double summation
rng("default") M = 100; % Some temporary vectors so that the code can run t = linspace(2,10,10001); y = sqrt(t); x = abs(ra...

3일 전 | 0

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How do I interpolation into a ODE45 function for my trajectory code?
I additionally told ode45 to stop integration at h = 0. clc clear % define the initial conditions for the falling object y...

3일 전 | 0

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custom equation fit in curveFitter is not working
pc2 = [ 0 0.0001 0.0011 0.0216 0.2847 0.8708 1.0000]; lam_2 = [ 0 30 55 110 2...

3일 전 | 1

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numerical integration inf to inf
Set a=-1+eps; b=1-eps; instead of a=-1; b=1; For comparison: syms x e = 0.01; f = 1/sqrt((1-x^2)+(e/2)*(1-x^4)); valu...

3일 전 | 0

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Bessel Equation VPASolve for the order
nu = 0:0.1:7; B = besselk(nu,3)-5; plot(nu,B) fun = @(nu)besselk(nu,3)-5; nu = fzero(fun,[6 7])

3일 전 | 1

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I suggest you evaluate the three profit functions for a rectangular region [alpha_min,alpha_max] x [ F_min,F_max] and introduce ...

3일 전 | 0

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Problem with undefined function
An alternative without the toolbox: logncdf_user = @(x,mu,sigma) 0.5*(erf((log(x)-mu)/(sqrt(2)*sigma))+1); x=0:0.1:10; hold o...

4일 전 | 0

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A system of nonlinear equations with three variables
The equations for x and y (eqnx and eqny) are polynomials of degree 3 in x resp. y. They might have several real solutions x an...

4일 전 | 0

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Way to solve AX=XB
dim = 4; X = sym('X',[dim dim]); A = rand(dim); B = A.'; [M, ~] = equationsToMatrix(A*X==X*B) if rank(M) < size(A,1)^2 N...

5일 전 | 0

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Trouble using lsqnonlin to fit the IV curve of a solar cell
You did not include global V Voc Jsc T k q J in the script part. clc clear global V Voc Jsc T k q J %reads input file ...

6일 전 | 0

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How do I represent this sym function as a written formula
syms s f = vpa(ilaplace(1/((s+7)*(s^3+4*s^2+6*s+5))),4)

6일 전 | 0

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Invalid use of operator. error, dont know what to change to fix it.
Elementwise operations are .* ./ and .^ .) does not exist. f = (x.^2).*exp(-x)

6일 전 | 0

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I want to check if something algebraically simplifies to 0 when i sub in values
Euler equations of gas dynamics ? Eigenvalues and Eigenvectors of the Jacobian are well-studied. Why reinvent the wheel ? syms...

6일 전 | 0