Answered

How to fix: Index exceeds matrix dimensions

The for-loop increases i automatically. Thus remove the line "i=i+1".

How to fix: Index exceeds matrix dimensions

The for-loop increases i automatically. Thus remove the line "i=i+1".

1 jour ago | 0

Answered

simple integration calculation to find the area ?

value_integral = trapz(T,V)

simple integration calculation to find the area ?

value_integral = trapz(T,V)

2 jours ago | 0

Answered

Matrix dimension do not agree when solving a singular bvp using bvp4c

Your boundary conditions can not be handled by bvp4c: You prescribe two times that y(2)=0 at the left boundary point and you gi...

Matrix dimension do not agree when solving a singular bvp using bvp4c

Your boundary conditions can not be handled by bvp4c: You prescribe two times that y(2)=0 at the left boundary point and you gi...

2 jours ago | 0

Answered

Trying to solve a definite integral but wont give numerical solution

Q=150; k=1.49; n=0.02; So=0.0048; b=3; g=32.2; x1=0; y1=3; %x2=200; h=20; x2=200; f_xy=@(y)(So-((Q*n)./(k*b*(y.^(5/3)...

Trying to solve a definite integral but wont give numerical solution

Q=150; k=1.49; n=0.02; So=0.0048; b=3; g=32.2; x1=0; y1=3; %x2=200; h=20; x2=200; f_xy=@(y)(So-((Q*n)./(k*b*(y.^(5/3)...

2 jours ago | 1

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Answered

How to translate an ArgMin with a summation inside?

dt = (t-s*x).'*(t-s*x); where x is a scalar and t and s are column vectors of the same length.

How to translate an ArgMin with a summation inside?

dt = (t-s*x).'*(t-s*x); where x is a scalar and t and s are column vectors of the same length.

4 jours ago | 0

Answered

numerical solution the given equation to determine the zero value of k

solvk = @(k) 1+cos(k*l).*cosh(k*l) + (M/Mt).*k*l.*(cos(k*l).*sinh(k*l)-sin(k*l).*cosh(k*l)); val = fzero(solvk,0.1)

numerical solution the given equation to determine the zero value of k

solvk = @(k) 1+cos(k*l).*cosh(k*l) + (M/Mt).*k*l.*(cos(k*l).*sinh(k*l)-sin(k*l).*cosh(k*l)); val = fzero(solvk,0.1)

5 jours ago | 0

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Answered

Skipping the for loop if condition is meet

idx = a~=b; c(idx) = a(idx)-b(idx);

Skipping the for loop if condition is meet

idx = a~=b; c(idx) = a(idx)-b(idx);

5 jours ago | 0

Answered

Solve one variable equation in Interval

x = (Tem.'*Tem)/(Tem.'*Tshaft) where Tem, Tshaft are column vectors of the same length.

Solve one variable equation in Interval

x = (Tem.'*Tem)/(Tem.'*Tshaft) where Tem, Tshaft are column vectors of the same length.

6 jours ago | 0

Answered

Need help to put condition in my optimization function

T0= fsolve(@(tw0) (exp(-s2.^2./2).*exp(tw0.*s2).*(1-qfunc((t1-s1-rho.*tw0+rho.*s2)./sqrt(1-rho.^2))))-P*(1-qfunc((t1-rho.*tw0)./...

Need help to put condition in my optimization function

T0= fsolve(@(tw0) (exp(-s2.^2./2).*exp(tw0.*s2).*(1-qfunc((t1-s1-rho.*tw0+rho.*s2)./sqrt(1-rho.^2))))-P*(1-qfunc((t1-rho.*tw0)./...

6 jours ago | 0

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Answered

How can I solve a complicated symbolic integral

There are integrals with no analytical antiderivative - yours seems to be one of them. In other words: assign values to r and M...

How can I solve a complicated symbolic integral

There are integrals with no analytical antiderivative - yours seems to be one of them. In other words: assign values to r and M...

6 jours ago | 0

Answered

Fit differential equation to a curve

Our standard reference: https://de.mathworks.com/matlabcentral/answers/43439-monod-kinetics-and-curve-fitting

Fit differential equation to a curve

Our standard reference: https://de.mathworks.com/matlabcentral/answers/43439-monod-kinetics-and-curve-fitting

6 jours ago | 0

Answered

MATLAB CODE TO FIND LOCAL EXTREMA OF A FUNCTION

syms x y f = x^2 + y^3 - 3*x*y; fx = diff(f,x); fy = diff(f,y); eqns = [ fx == 0, fy == 0]; vars = [x y]; [solx, soly] = s...

MATLAB CODE TO FIND LOCAL EXTREMA OF A FUNCTION

syms x y f = x^2 + y^3 - 3*x*y; fx = diff(f,x); fy = diff(f,y); eqns = [ fx == 0, fy == 0]; vars = [x y]; [solx, soly] = s...

12 jours ago | 0

Answered

Solving Ax=b with both unknowns in A and b

Now if W_{0}^{m} and W_{N+1}^{m} are 0 (I think you meant W_{0}^{m} instead of W_{N}^{m}), you have a system of N equations in W...

Solving Ax=b with both unknowns in A and b

Now if W_{0}^{m} and W_{N+1}^{m} are 0 (I think you meant W_{0}^{m} instead of W_{N}^{m}), you have a system of N equations in W...

12 jours ago | 1

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Answered

Fit of numerical expression

Use an anonymous function to define your model equation. For examples, see https://de.mathworks.com/help/curvefit/fittype.html...

Fit of numerical expression

Use an anonymous function to define your model equation. For examples, see https://de.mathworks.com/help/curvefit/fittype.html...

12 jours ago | 0

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Answered

Matlab coder alternative to lsqlin

https://www.mat.univie.ac.at/~neum/software/minq/ http://sigpromu.org/quadprog/

Matlab coder alternative to lsqlin

https://www.mat.univie.ac.at/~neum/software/minq/ http://sigpromu.org/quadprog/

12 jours ago | 0

Answered

how to integrate this function?

T = ...; dt = T/(numel(B)-1); t = linspace(dt,T-dt,numel(B)-1); dB = diff(B); value = trapz(t,dB.^2)

how to integrate this function?

T = ...; dt = T/(numel(B)-1); t = linspace(dt,T-dt,numel(B)-1); dB = diff(B); value = trapz(t,dB.^2)

12 jours ago | 1

| accepted

Answered

Error using / Matrix dimensions must agree

fp = (1./(x + h) - 2*(1/x) + 1./(x - h)) ./h.^2;

Error using / Matrix dimensions must agree

fp = (1./(x + h) - 2*(1/x) + 1./(x - h)) ./h.^2;

12 jours ago | 0

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Answered

What's the best way to check if a system of one equation and one inequality has any solution?

Use "fmincon" with an arbitrary objective function (e.g. 0).

What's the best way to check if a system of one equation and one inequality has any solution?

Use "fmincon" with an arbitrary objective function (e.g. 0).

16 jours ago | 1

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Answered

How to write and solve this pde system

If your system is in one spatial dimension, use "pdepe". Examples on how to set up your problem are given here: https://de.mat...

How to write and solve this pde system

If your system is in one spatial dimension, use "pdepe". Examples on how to set up your problem are given here: https://de.mat...

16 jours ago | 0

| accepted

Answered

How to Solve sets of equations with constants

Multiply the first equation with 2 and subtract the second. d cancels out and you can solve for c. Multiply the first equation ...

How to Solve sets of equations with constants

Multiply the first equation with 2 and subtract the second. d cancels out and you can solve for c. Multiply the first equation ...

17 jours ago | 1

Answered

how to calculate complex integration along a closed curve.

I = 1/(2*pi*1I) * integral_{t=0}^{t=T} f(z(t))*z'(t) dt where z(t) is a parametrization of gamma. The last integral can numeri...

how to calculate complex integration along a closed curve.

I = 1/(2*pi*1I) * integral_{t=0}^{t=T} f(z(t))*z'(t) dt where z(t) is a parametrization of gamma. The last integral can numeri...

17 jours ago | 0

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Answered

How to solve a system of two PDEs encountered in Mathematical Biology

This should help you starting: https://de.mathworks.com/matlabcentral/answers/440015-first-order-partial-differential-equations...

How to solve a system of two PDEs encountered in Mathematical Biology

This should help you starting: https://de.mathworks.com/matlabcentral/answers/440015-first-order-partial-differential-equations...

17 jours ago | 0

Answered

Solving Finite Difference Method Using ODE15s

%OTHER FILE THAT CALLS FUNCTION (Excluding all the constants) T0 = ones(n,1)*298; %matrix of initial condition for T, rows = nu...

Solving Finite Difference Method Using ODE15s

%OTHER FILE THAT CALLS FUNCTION (Excluding all the constants) T0 = ones(n,1)*298; %matrix of initial condition for T, rows = nu...

17 jours ago | 1

| accepted

Answered

Solving Finite Difference Method Using ODE15s

You can either solve for T1,...,T_(n-1) (and the two extra variables) using ODE15S and calculate T(n) internally each time the...

Solving Finite Difference Method Using ODE15s

You can either solve for T1,...,T_(n-1) (and the two extra variables) using ODE15S and calculate T(n) internally each time the...

18 jours ago | 0

Answered

Piecewise function, ranges are variable

EPS = linspace(-0.5,0.5); L0 = arrayfun(@(C)pwlaborsupply0(C, 0.1,0.25),EPS); plot(EPS,L0)

Piecewise function, ranges are variable

EPS = linspace(-0.5,0.5); L0 = arrayfun(@(C)pwlaborsupply0(C, 0.1,0.25),EPS); plot(EPS,L0)

19 jours ago | 0

| accepted

Answered

ODE for 2 variables

function main p = [1 2 3 4 5 6 7]; A = 20; x0 = 2; y0 = 5; z0 = 27; u0 = -34; a0 = [x0; x0*y0; x0*z0; x0*u0]; ts...

ODE for 2 variables

function main p = [1 2 3 4 5 6 7]; A = 20; x0 = 2; y0 = 5; z0 = 27; u0 = -34; a0 = [x0; x0*y0; x0*z0; x0*u0]; ts...

19 jours ago | 1

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Answered

Non linear function for an optimal control problem

https://tomopt.com/docs/propt/tomlab_propt015.php

Non linear function for an optimal control problem

https://tomopt.com/docs/propt/tomlab_propt015.php

19 jours ago | 0

Answered

could anyone help me to solve the issue.

idx = B==0; B(idx) = A(idx)

could anyone help me to solve the issue.

idx = B==0; B(idx) = A(idx)

19 jours ago | 0

| accepted

Answered

How to obtain the numerical integration of a set of different values of prameter which appear in Xmin

M=arrayfun(@(D) integral3(@(k,x,y) TuuV(k,x,y,D),kc.*sqrt(mu+delta-D),ku,0,pi/2,0,pi/4,'reltol',1e-4),v);

How to obtain the numerical integration of a set of different values of prameter which appear in Xmin

M=arrayfun(@(D) integral3(@(k,x,y) TuuV(k,x,y,D),kc.*sqrt(mu+delta-D),ku,0,pi/2,0,pi/4,'reltol',1e-4),v);

20 jours ago | 1

| accepted