Community Profile # Torsten

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% Define circuit parameters Vin_rms = 120; % V Vout = 2.4; % V Iload = 25e-3; % A Vripple = 0.12; % V R2 = 1e3; % Ohm...

I am trying to get the answer for the sum to infinity for a geometric series. My output should be 3/2 and a loop should be used. I've done that but it won't work. Please help
Sum2Infinity = 0.0; for i = 0:1:10000 Sum2Infinity = Sum2Infinity + FirstTerm * CommonRatio^i; end

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I cant get the correct plotting
% Given p = 7500; % kg/m^3 Cd33 = 16*10^10; %N/m^2 vp= 4620; % Ns/m Ceb = 1.43E-9; % F phi = 2.62; % As/m % Piezoelectri...

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Matrix size mismatch Matlab Function
S(j) is a single value (1x1). exp(-norm(r-mu(:,j))^2/(2*sigma^2)) is a vector (50x1). You try to save a vector in a scalar val...

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Help with solving a system of coupled equations of motions in time domain?
How did you come up with the sdot vector for the equations so far ? If you use a mass matrix, you simply have to add the additi...

Error using odearguments ; Error in ode15s (line 153); Error in anand_shrivastan (line 625) ;below is the code
Add dZdt = dZdt.'; as last line in function "SpeciesODE".

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How to solve large system of nonlinear equations using fsolve?
n = 20; A = rand(n); B = @(X)X*A-X.*X; X0 = rand(1,n); X = fsolve(B,X0) % or n = 20; A = rand(n); B = @(X)quadratic(X,A)...

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Cannot use solver function with poisscdf function
syms lambda n eqn = exp(-lambda)*symsum(lambda^n/factorial(n),n,0,35) == 0.95; solve(eqn,lambda)

1日 前 | 0

The inner while loop is not necessary: if flag(i,2)-flag(i-1,2) == 1, then of course flag(i,2)-flag(i-1,2) ~== -1. Thus the incr...

1日 前 | 0

Problem during the use of 'fzero'
I'm surprised the initial value x0 is part of your function definition. Are you sure this is correct ? %% Global variables decl...

1日 前 | 0

How to solve 2nd order BVP using Chebyshev Spectral Method?
alpha = 0.1; xmesh = linspace(0,1,50); solinit = bvpinit(xmesh, [0 0]); bvpfcn = @(x,y)[y(2);0.75/(1+6*alpha*y(2)^2)]; bcfcn...

1日 前 | 0

MHN function MHN % Initialization of paramters beta=1.5; lambda=1.5; wt=2.5; wb=1.5; ks1=0.5; ks2=0.1; a=0.5; epsilo...

2日 前 | 0

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optimization in smart energy management system.I have used MILP algorithm but i got infeasible solution no point satisfy the constraints.how could i sort out these issues.
I have used MILP algorithm but i got infeasible solution no point satisfy the constraints.how could i sort out these issues. It...

2日 前 | 0

how to supply a cost function gradient based on some of optimisation paramters
Would you please tell me if there is a way to supply a gradient based on some optimization parameters and use the finite differe...

2日 前 | 0

Nested Function is not working correctly with ode45
You can also get an analytical solution for v since your piecewise equation is easily integrated. EGA215_1234567_A1_Q2 functio...

2日 前 | 0

Constrained Optimization Problem With Obj Function Which Is Numerical Solution To A System Of ODE's
You never use the 53 solution variables of u and v in your code. And you solve the following ODEs for u and v du/dt = u, u(0)...

3日 前 | 0

Each element of INTCON must be an integer in the range [1 numVars], ([1 1]). What is the meaning??
f = c' * P_max + c0; % objective function is a scalar value. Thus intlinprog assumes you want to solve a problem with only one ...

3日 前 | 1

Error using symfun/subsref (line 203) Invalid argument at position 2.
N(i) = symfun(((1/(2*A))*(a(i)+b(i)*x+c(i)*y)),[x y]); instead of N = symfun(((1/(2*A))*(a(i)+b(i)*x+c(i)*y)),[x y]); And N...

3日 前 | 0

I have these 3 columns and I want to divide p/z and put the p/z values in a new columns
p=[2080,1885,1620,1205,888,645]; z=[0.759,0.767,0.787,0.828,0.866,0.900]; gp=[0,6.873,14.002,23.687,31.009,36.207]; new_row =...

4日 前 | 0

How to obtained matris vector solution using fminunc function?
You will have to use fminunc three times: c_1=[3;5;8]; c_2=[2;6;8]; x1_sol = zeros(size(c_1)); x2_sol = zeros(size(c_1)); f...

4日 前 | 0

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Applying updated initial conditions at every points of tspan and solve system of ODE using ode45
Then why do you solve for v1 if you want to prescribe it ? Simply set v1 = u0x + vp*p1 in your code and determine displacement...

4日 前 | 0

Using lsqnonlin for deconvolution
lsqnonlin tries to adjust x, and you reset it to 0: function F=insulin(x) ... x=zeros(89,1); This destroys the complete fitt...

4日 前 | 1

The following error was reported evaluating the function in FunctionLine update: Unable to convert expression into double array.
Your calculations partially produce complex and NaN values. And you cannot prevent this by trying to force them to be real. pv1...

5日 前 | 0

Solve of implicity equations
You should first check whether a zero of your function really exists. It doesn't seem to be the case: alpha = 0.14; A = 3300; n...

5日 前 | 0

why do I get this error in the simulation
Before calling "interp1", use % Sort array oxygen_energy_tot in ascending order [oxygen_energy_tot_sorted,idx_sort] = sort(oxy...

6日 前 | 0

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ode45 with a array of vector
a1 = ...; a2 = ...; a3 = ...; b1 = ...; b2 = ...; b3 = ...; c1 = ...; c2 = ...; c3 = ...; vp = ...; tValues = linspace...

6日 前 | 0

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function handle array Problem
result = integral(@fun,0,1000,'ArrayValued',1) function value = fun(a) m = [1,2]; U(3) = a + 2; V(3) = a - 2; for...

6日 前 | 0

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i want to solve a set of homogeneous linear equation
Or use the following code to produce an optimal solution in the least-squares sense: A =1.0e+04*[6.6064,-3.5642,0,0;-3.5642,6.6...

6日 前 | 0

is there any way to get a 2nd order polynominal through 2 points(each end point)
rng("default") syms a b c x y n = 30; % number of data points xdata = sym('xdata',[1 n]); % x values ydata = sym('ydat...

6日 前 | 0

Error using plot Vectors must be the same length
As you can see above, S and f have a different number of elements. So they cannot be plotted against each other.

7日 前 | 1