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How do I find if a point is within the volume of a rotated ellipsoid
Apply the "anti-rotation" of the ellipsoid to the point P=(x,y,z) and check whether the image P'=(x',y',z') you receive lies in ...
How do I find if a point is within the volume of a rotated ellipsoid
Apply the "anti-rotation" of the ellipsoid to the point P=(x,y,z) and check whether the image P'=(x',y',z') you receive lies in ...
3 days 前 | 1
| 已接受
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In my code, I am getting plot on lambda=1, but rest plots are not reflecting. Please help to get all figures.
The results for the last 3 values of lambda are NaN (see above) - thus they are not plotted.
In my code, I am getting plot on lambda=1, but rest plots are not reflecting. Please help to get all figures.
The results for the last 3 values of lambda are NaN (see above) - thus they are not plotted.
17 days 前 | 0
| 已接受
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Wanting all results for an algebraic equation that is within a function .
One method: Define the algebraic variables as additional solution variables to the ODE system. This results in a DAE-system (i....
Wanting all results for an algebraic equation that is within a function .
One method: Define the algebraic variables as additional solution variables to the ODE system. This results in a DAE-system (i....
18 days 前 | 0
已回答
Simulating a system of damped PDEs with the Matlab PDE toolbox.
Did you try to set the problem as u1_dot = u3 u3_dot = delta(u1) + J1 u2_dot = u4 u4_dot = -u4 + delta(u2) +J2 ?
Simulating a system of damped PDEs with the Matlab PDE toolbox.
Did you try to set the problem as u1_dot = u3 u3_dot = delta(u1) + J1 u2_dot = u4 u4_dot = -u4 + delta(u2) +J2 ?
19 days 前 | 1
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pdepe fails to solve PDEs with absorbing boundaries
This is what I get from AI when I type in your error message: This error occurs because a third-party package (usually MatCont)...
pdepe fails to solve PDEs with absorbing boundaries
This is what I get from AI when I type in your error message: This error occurs because a third-party package (usually MatCont)...
24 days 前 | 0
| 已接受
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different in Poisson distribution test
"kstest" is not applicable since the Poisson Distribution is a discrete, not a continuous distribution. Since the example "Test...
different in Poisson distribution test
"kstest" is not applicable since the Poisson Distribution is a discrete, not a continuous distribution. Since the example "Test...
28 days 前 | 1
| 已接受
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Find all roots of a transcendental equation
Quite a hack and no guarantee that you will find all roots in the specified region, but I think there is no better method for th...
Find all roots of a transcendental equation
Quite a hack and no guarantee that you will find all roots in the specified region, but I think there is no better method for th...
1 month 前 | 0
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How to use the "Use weights for each response" option on simbiology model analyzer on a Fit program?
Did you study the example "Use Group-Specific Dosing Data for Parameter Estimation with Numeric Weights" under https://uk.mat...
How to use the "Use weights for each response" option on simbiology model analyzer on a Fit program?
Did you study the example "Use Group-Specific Dosing Data for Parameter Estimation with Numeric Weights" under https://uk.mat...
1 month 前 | 0
| 已接受
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Saving a matrix with a variable that could take any value
Either define the matrix as a function handle SM = @(L)[12/L^3 6/L^2 -12/L^3 6/L^2; 4/L -6/L^2 2/L 6/L^2; ...
Saving a matrix with a variable that could take any value
Either define the matrix as a function handle SM = @(L)[12/L^3 6/L^2 -12/L^3 6/L^2; 4/L -6/L^2 2/L 6/L^2; ...
1 month 前 | 1
| 已接受
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Save variable number in matrix for later iteration
Maybe like this ? I'm not sure whether you want to take the elements of C and J according to the order of the elements in I or...
Save variable number in matrix for later iteration
Maybe like this ? I'm not sure whether you want to take the elements of C and J according to the order of the elements in I or...
1 month 前 | 1
| 已接受
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How to solve dy/dt=A(t)*y where y is a vector (3 elements) and A is 3x3 matrix with time dependent elements.
The code should somehow look like: Y0 = [1;0;0]; tspan = [0 1]; v1 = ...; % your first vector v1 needed to compute A v2 = ....
How to solve dy/dt=A(t)*y where y is a vector (3 elements) and A is 3x3 matrix with time dependent elements.
The code should somehow look like: Y0 = [1;0;0]; tspan = [0 1]; v1 = ...; % your first vector v1 needed to compute A v2 = ....
1 month 前 | 0
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Please help me to run this simple code
Your solution for rr(3) becomes complex-valued. For complex-valued functions, you can plot e.g. their real part, their imagina...
Please help me to run this simple code
Your solution for rr(3) becomes complex-valued. For complex-valued functions, you can plot e.g. their real part, their imagina...
2 months 前 | 0
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How do I add summation to a symbolic equation in order to integrate across set bounds?
Use logncdf: https://uk.mathworks.com/help/stats/logncdf.html Use to compute f_act with the help of "logncdf" and use the ...
How do I add summation to a symbolic equation in order to integrate across set bounds?
Use logncdf: https://uk.mathworks.com/help/stats/logncdf.html Use to compute f_act with the help of "logncdf" and use the ...
2 months 前 | 1
| 已接受
已回答
Implicit expansion with arrayfun (cpu vs gpu)
F3 = cellfun(@myadd, [{x}], [{y}], 'UniformOutput', false) will work. Arrayfun tries to apply "myadd" to [first element of x,f...
Implicit expansion with arrayfun (cpu vs gpu)
F3 = cellfun(@myadd, [{x}], [{y}], 'UniformOutput', false) will work. Arrayfun tries to apply "myadd" to [first element of x,f...
2 months 前 | 1
已回答
Inverse Problem, I have unknowns to solve it
L and N cannot be estimated separately. As long as phi is a single scalar value , L*phi + N must be treated as only one parame...
Inverse Problem, I have unknowns to solve it
L and N cannot be estimated separately. As long as phi is a single scalar value , L*phi + N must be treated as only one parame...
3 months 前 | 0
| 已接受
已回答
expanded vs unexpanded polynomials in symbolic integrals
Without giving the limits of integration, "int" returns an arbitrary antiderivative for the function you want to integrate. But ...
expanded vs unexpanded polynomials in symbolic integrals
Without giving the limits of integration, "int" returns an arbitrary antiderivative for the function you want to integrate. But ...
3 months 前 | 0
| 已接受
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symbolic integrate and plot a function of one variable
syms x(u) y(u) g(u) C1 C2 v uref g(u) = 159648450049389632/(3991211251234741*(4 - (C1 + 2*u + 3)^(1/2))^(1/2)) + 14; x = C2*ex...
symbolic integrate and plot a function of one variable
syms x(u) y(u) g(u) C1 C2 v uref g(u) = 159648450049389632/(3991211251234741*(4 - (C1 + 2*u + 3)^(1/2))^(1/2)) + 14; x = C2*ex...
3 months 前 | 0
| 已接受
已回答
Trying to make a goal seek like program using fsolve?
clear all; close all; clc f= @(x) Average1(x)-65; engineering= 30; % Intiall estimate engineering = fsolve(f,engineering) ...
Trying to make a goal seek like program using fsolve?
clear all; close all; clc f= @(x) Average1(x)-65; engineering= 30; % Intiall estimate engineering = fsolve(f,engineering) ...
3 months 前 | 0
| 已接受
已回答
numerical Instabilities for bessel functions
Although it's slow, the full Newton method seems to work in this case (except for one value of X_kRE): clear all; close all; ...
numerical Instabilities for bessel functions
Although it's slow, the full Newton method seems to work in this case (except for one value of X_kRE): clear all; close all; ...
3 months 前 | 1
已回答
i want to add cplex and yalmip on my mac how ?
This is the problem-based MATLAB code to set up your problem. I might have done some mistakes translating your constraints, but ...
i want to add cplex and yalmip on my mac how ?
This is the problem-based MATLAB code to set up your problem. I might have done some mistakes translating your constraints, but ...
3 months 前 | 1
已回答
Setting constraint between estimation parameters in nonlinear grey box estimation
I doubt that you can set lower and upper bounds on parameters as nonlinear functions of other parameters. In my opinion, Paramet...
Setting constraint between estimation parameters in nonlinear grey box estimation
I doubt that you can set lower and upper bounds on parameters as nonlinear functions of other parameters. In my opinion, Paramet...
3 months 前 | 0
| 已接受
已回答
Help implementing 4th-order Runge–Kutta for ODEs with Dirac impulses (discontinuous system)
Look at figure 3 (a) and (b) of the article. Each time the curve for U becomes discontinuous, a dosing is applied to the mice. I...
Help implementing 4th-order Runge–Kutta for ODEs with Dirac impulses (discontinuous system)
Look at figure 3 (a) and (b) of the article. Each time the curve for U becomes discontinuous, a dosing is applied to the mice. I...
3 months 前 | 0
已回答
Defining a function in one file and using it in a second file
The calls must be for i = 2:NumTimesteps % for each timestep % 1. Soil Respiration % as per Reich, 2002 SoilResp_gC = S...
Defining a function in one file and using it in a second file
The calls must be for i = 2:NumTimesteps % for each timestep % 1. Soil Respiration % as per Reich, 2002 SoilResp_gC = S...
3 months 前 | 0
已回答
real part of eigenvalues vs damping plot
I don't know what you try to plot, but the cell matrix lamda below should contain all information you need. mr=306, mj=141.5, m...
real part of eigenvalues vs damping plot
I don't know what you try to plot, but the cell matrix lamda below should contain all information you need. mr=306, mj=141.5, m...
3 months 前 | 0
已回答
First value of an array does not display with a decimal
If you like it more, you can use sprintf('%f %f %f',[x, y, z]) instead of disp([x y z]);
First value of an array does not display with a decimal
If you like it more, you can use sprintf('%f %f %f',[x, y, z]) instead of disp([x y z]);
3 months 前 | 1
已回答
How to integrate a control system by ode45 with PID control input ?
Add a second differential equation dV/dt = P.Xd - X with initial condition V(0) = 0 Then V(t) = integral_{0}^{t} (P.Xd -...
How to integrate a control system by ode45 with PID control input ?
Add a second differential equation dV/dt = P.Xd - X with initial condition V(0) = 0 Then V(t) = integral_{0}^{t} (P.Xd -...
3 months 前 | 0
已回答
Matlab's polyfit gives different results when the independent variable is integer than when the independent variable is floating point. Why is that so?
To be consistent, you must either use numDataPointsMinutes = [0,1,2,3, ... 27359]; instead of numDataPointsMinutes = [1,2,3, ...
Matlab's polyfit gives different results when the independent variable is integer than when the independent variable is floating point. Why is that so?
To be consistent, you must either use numDataPointsMinutes = [0,1,2,3, ... 27359]; instead of numDataPointsMinutes = [1,2,3, ...
4 months 前 | 0
| 已接受
已回答
How to remove the time dependence of an equation?
Use fimplicit(eq_14(t)==0,"r","LineWidth",2) instead of fimplicit(eq_14==0,"r","LineWidth",2) Why do you use a time-dependen...
How to remove the time dependence of an equation?
Use fimplicit(eq_14(t)==0,"r","LineWidth",2) instead of fimplicit(eq_14==0,"r","LineWidth",2) Why do you use a time-dependen...
4 months 前 | 0
| 已接受
已回答
Seeking advice from experts
Use one of the below codes instead. You can't nest functions within a script, but only within another function. So either defi...
Seeking advice from experts
Use one of the below codes instead. You can't nest functions within a script, but only within another function. So either defi...
4 months 前 | 0
已回答
Newtonian Mechanics vector solution needed to find the range of forces (P) that satisfy Fnetx = 0
Your search will never find a value for P for which Fnetx is exactly 0. Better use "fsolve" to solve for the corresponding roo...
Newtonian Mechanics vector solution needed to find the range of forces (P) that satisfy Fnetx = 0
Your search will never find a value for P for which Fnetx is exactly 0. Better use "fsolve" to solve for the corresponding roo...
4 months 前 | 0
| 已接受
