Torsten

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I'm getting the 'Not enough input arguments' error event though I am pretty sure I am giving all the arguments needed at all times
format long [x,it] = NewtonSystemSolver(5, 10^-12, 100, [5e4,0,0,0,5e4].', @Slammer1, @Slammer1Jacobian) Slammer1(x) function...

3 hours 前 | 1

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ode15s giving integration tolerance error and loop stopping at zeroth iteration
The evaluation of the variable "ros" for your vector of initial conditions y0est gives NaN. The reason is that you start with mL...

4 hours 前 | 0

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Multiple iterations for plotting
Maybe you mean h= 0.5; b = 0.5; d1= 0.474; d2= 0.035; As= 2512*10^-6; Asc= 2512*10^-6; fy= 400*10^6; Es= 200*10^9; fc...

20 hours 前 | 0

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There is a matrix operation, A*B=c. would there be a way to find a specific elemetn in C and call out variables that were involved in the calculation of the specific element
Since you set C = A.*B and not C = A*B, the elements that influence the value at position (i,j) in C are the elements (i,j) in A...

23 hours 前 | 0

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Set up a gradient descent algorithm for a multivariable economic dispatch problem
There must be something wrong in the computation of t in your code. For t=1, the usual gradient descent works: clc; clear; sym...

1 day 前 | 0

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Setting Boundary Conditions & Using bvp4c
xcastle = 20; % x-coordinate of target v0 = 20; % Prescribed (...

2 days 前 | 0

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Solving ODE system with a constraint/boundary condition
p_A + p_B should remain constant since dp_A/dz + dp_B/dz = 0 according to your equations. But this is not the case for p_A + p_...

2 days 前 | 0

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How do I write time dependent variables in my equations of motion?
Integrate from 0 to 5 with F = 0, Vin = 280. Restart with the solution obtained and integrate from 5 to 10 with F = -10, Vin = ...

3 days 前 | 0

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What is the mathematical form called for PDEs used with the MATLAB function pdepe?
Would this be considered an elliptical/parabolic PDE in conservative form? No. "Conservative" usually refers to the first spati...

3 days 前 | 1

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Energy optimization robot paths
toolPositionHome = T_home(1:3,4); % Define a Set of Waypoints Based on the Tool Position waypoints = toolPositionHome + ... ...

3 days 前 | 0

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I'm having an issue defining the initial conditions for solving a system of differential equations
You have two second-order ODEs for th and w. Thus you need 4 boundary conditions (not 6) that can be prescribed for w, dw/dx, ...

4 days 前 | 1

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Received this error, not sure how to fix
Maybe you mean for ni=1:j instead of for ni=1+j If not, you try to access N(7) which does not exist.

4 days 前 | 0

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Vector Length Error when Calling Function
You overwrite MATLAB's intrinsic "length" in the lines length = data(2:end,2) length = cell2mat(length)

4 days 前 | 0

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How to match matrix elements for a condition?
If A becomes larger, this brute-force way of solving will become intractable. A = [15 25 36 17 48 59 31 64 18 21 97 84 31 64 15...

4 days 前 | 0

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How do I use my data set in an equation?
Say lm is 2x6, e.g. lb = [1 2 3 4 5 6] lm = [7 8 9 10 11 12;13 14 15 16 17 18] What would you like to compute ? [log(1/7) lo...

4 days 前 | 0

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error >> Matrix dimensions must agree. How to fix
z doesn't need to be prescribed in array form because you integrate with respect to z. Here I assume that the integration variab...

4 days 前 | 0

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How to get the formal expression of the expansion of power of a polynomial with symbolic calculation
syms x n = 10; k = 2; a = str2sym(compose("a" + (0:n-1))) f = x^n + sum(a.*x.^(0:n-1)) g = f^k; coefficients = coeffs(coll...

4 days 前 | 0

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Using MATLAB to do Numeric Calculus
Your code is correct. Here is a simpler way to define s and v. Just substitute tcrash by tmax. tcrash = 1596.2/(2*4.905)+sqrt...

5 days 前 | 0

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probability that values are belong to an interval
It depends on how x is distributed. If f is the (continuous) probability density function for x, you get the probability p as ...

5 days 前 | 0

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How to use ode15s to solve a stiff ode with mass?
tf = 200; x0 = [0 0 0 0 2500 0 0.8 0 50 50 50 50 5]; M = zeros(13,13); M(1,1) = 1; M(2,2) = 1; M(3,3) = 1; M(4,4) = 1; ...

5 days 前 | 1

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I am getting error:Warning: Failure at t=0.000000e+00. Unable to meet integration tolerances without reducing the step size below the smallest value allowed (7.905050e-323)
If you remove the semicolon behind %% mass balances dy_dz=[1/u*(-r3) 1/u*(...

6 days 前 | 0

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vectorized operations on symbolic functions
rng("default") syms x1 x2 x3; % symbolic variables y = x1^3/3 + x2^2/2 - x3; % symbolic function y X = rand(500,3) % each row...

6 days 前 | 0

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Dot product does not work for symbolic vectors
Since you cannot assume functions to be real-valued, you must use dot(r,r) - (r_x*r_x' + r_y*r_y' + r_z*r_z' ) instead of dot...

6 days 前 | 1

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NaN in converting a sym to double
exp(lambda1*c0*eta0) and exp(lambda3*c0*eta0) evaluate to Infinity for s big enough (s slightly bigger than 0 already suffice...

7 days 前 | 0

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How to plot a three variable complex function
You cannot plot the complete result of a function that depends on three independent variables. But you can plot it on slices (i...

7 days 前 | 0

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PDEPE solver failure (spatial discretization) ; partial differential/derivative temperature modelling
Please include the constants defined as globals so that we can test your code. One obvious error is the boundary condition for...

7 days 前 | 0

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Packed bed storage modeling probelm
rhoS = 2750; % Solid density [kg/m^3] cpS = 850; % Solid specific heat capacity [J/(kg*K)] ks = 1.28; ...

7 days 前 | 0

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Extracting values from optimization variable and setting constraints
Defining vectors QTYup and QTYdown as integer vectors with 0<=QTYup(i)<=5 and -5<=QTYdown(i)<=0 (i=1,...,3 for tomatoes, onions ...

8 days 前 | 0

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I am trying to form a conditional loop that shows the growth of money, I put in $1000 every year and it grows by 85 for ten years but keep returning one value
money = zeros(10,1); supersaver = 1000; Return = 0.08; money(1) = supersaver*(1+Return); % Money at end of year 1 for i = 2...

8 days 前 | 0

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Getting error while trying to solve boundary condition equations.
For M1 = 0-0.4, bvp4c cannot find a solution. So I started with M1 = 0.5. close all; clear all; clc; K1=0; eta1=0.2; eta2=0....

8 days 前 | 0

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