Respondida
numerical integration and solving for limit
Here is the maximum value you can insert for t: syms x f = 1/sqrt((1-x^2)+0.01/2*(1-x^4)); vpaintegral(f,x,-1,1) And here is...

más de 3 años hace | 0

| aceptada

Respondida
errors on function vs time plot
t = linspace(-1,1,100); v = 12*exp(-8*t).*(t>=0); plot(t,v)

más de 3 años hace | 0

Respondida
Why doesn't my plot "go to infitnity"?
What finite y value do you want -inf to be in the plot ? Since nobody knows, MATLAB just skips these data points (same for NaN...

más de 3 años hace | 1

Respondida
How can I resolve this issue here, can anyone please help.
k1 is a vector. Thus with the commands dAdt(i) = dAdt(i) + k1.*yita_mn(i,j).*(At(j))*cos(Ot(j)-Ot(i)); dOdt(i) = dOdt(i) + k1....

más de 3 años hace | 0

Respondida
Double-check for any mistakes
- rho + gamma*(abar(t-1,1) - a(t-1,1)) - gamma*(a(t-1,1) - c(t-1,1)) - delta - (delta*a(t-1,1) + abar(t-1,1)*g_abar - gamma*(aba...

más de 3 años hace | 0

| aceptada

Respondida
2nd order lineair non-homogenous differential equation with EULER not working properly
The number of steps to take to reach tend is (tend-tstart)/dT, not tend/dT. Further, you apply the initial conditions at t = -3...

más de 3 años hace | 1

Respondida
Solution of the equation
This code doesn't work since there does not seem to be a solution for some or all of the d values you supplied. I suggest you f...

más de 3 años hace | 0

Respondida
ans = Empty sym: 0-by-1 error in solving equation
syms x y Y = 0:1:100; avd=5; s = 0.25; paco2=40; r= 0.8; hb=14; pb=740; eqn = ((hb*(((((pb-47)*y-paco2/r).^3+150*((pb-47...

más de 3 años hace | 0

Respondida
Numerical integration of second moment of area for given data
x and y data describe the curves of the upper and lower profile ? https://math.stackexchange.com/questions/3126310/calculating-...

más de 3 años hace | 0

Respondida
Delete 0's in a matrix
% First case (see above) A = [0,0;0,0;800,1096;0,1461;1462,1701]; A( any(~A,2), : ) = []; A % Second case (see above) A = [...

más de 3 años hace | 1

| aceptada

Respondida
Methods used inside "roots" and "solve" functions to solve polynomial equations.
For numerial computation of polynomial roots, see https://math.mit.edu/~edelman/publications/polynomial_roots.pdf https://de.m...

más de 3 años hace | 0

Respondida
add spesified value on array
x = 8e6 + 2e6*rand(1,1000) value = 3e5; x(x>9e6) = x(x>9e6) + value; x

más de 3 años hace | 0

| aceptada

Respondida
How do I remove the Ans from the result
How do I remove the Ans from the result By correctly coding the if-clause: Alpha = [1,0]; if Alpha(1,1) == 1 disp('Ok') e...

más de 3 años hace | 0

Respondida
How to solve Phase Change Stefan problem with the PDEtool?
There is no chance to solve the problem with a standard tool to solve partial differential equations (like the PDE Toolbox). I ...

más de 3 años hace | 0

| aceptada

Respondida
Plotting a 4D graph with the fourth dimension using color (a 3D graph with the fourth dimension represented using colors)
Use "slice". This will display R0 on predefined planes in 3d space.

más de 3 años hace | 1

Respondida
Solve a multiobjective optimization problem by problem-based approach in Matlab2021a
% teste_multiobjective file x1 = optimvar('x1','LowerBound',0); x2 = optimvar('x2','LowerBound',0); s1 = 5*x1 + 2.5*x2 >=...

más de 3 años hace | 0

Respondida
Plotting the function by the points that need to be determined
%% initial conditions global d k0 h_bar ksi m E; Ef = 2.77*10^3; Kb = physconst('boltzmann'); % 1.38*10^(-23) T = 0.12:0.24...

más de 3 años hace | 0

Respondida
How to find the maximum value of the power and its position on the time axis (x,y)?
s=1.25; t1=0:0.01:pi/2; t2=pi/2:0.01:pi; t=[t1 t2]; p1= 4*(sin(2*t1)).^2.*exp(-t1/s).^2 + 2; p2= 4*(sin(2*t2)).^2.*exp(-t2/...

más de 3 años hace | 1

Respondida
How to plot these three fucntion X,S and P in one graph with lines
t=0:0.5:14; X0=0.036; Xm=2.24; u0=1.14; S0=41.44; Ms=1.56; Yxs=0.37; Ypx=0.958; dt=0.90; X=(X0*Xm*exp(u0*t))./(Xm-X0+...

más de 3 años hace | 0

| aceptada

Respondida
How to make 'for loop' for three variables (i,j,n)?
for i=1:m-1 instead of for i=2:m-1

más de 3 años hace | 0

Respondida
goodness of fit data for a fit
Statistical information about the goodness of fit can be obtained by using "fit" instead of "lsqcurvefit" and the second output ...

más de 3 años hace | 0

Respondida
why plot not generate for the following codes?
creation = 1; syms n alpha = sym(0.03); ketalpha1 = symsum(exp(-abs(alpha)^2 * alpha^n / sqrt(factorial(n)) ), n, 0, 10); ...

más de 3 años hace | 0

| aceptada

Respondida
How to generate N independent, identically distributed random numbers from the Reciprocal Normal Distribution?
% Generate 10 random numbers from the inverse normal distribution % (mu=0, sigma=1) % % G(y) = 1 - F(1/y) % is the cumulati...

más de 3 años hace | 0

| aceptada

Respondida
'integral' with piecewise expressions
L = 1; Beta = @(y,L) pi/2.*((0<=y) & (y<L/2)) + (pi/2+0.3491).*((L/2<=y) & (y<3/4*L)) + (pi/2-0.3491).*((3/4*L<=y) & (y<=L)); ...

más de 3 años hace | 1

| aceptada

Respondida
All the combinations for 3 variables
https://de.mathworks.com/matlabcentral/fileexchange/5475-cartprod-cartesian-product-of-multiple-sets https://de.mathworks.com/m...

más de 3 años hace | 0

| aceptada

Respondida
Plotting the function by the points that need to be determined
Maybe something like this ? %% initial conditions global d k0 h_bar ksi m E; Ef = 2.77*10^3; Kb = physconst('boltzmann'); %...

más de 3 años hace | 0

Respondida
Plot-Parameter study- Adsorption
I don't know whether you and Sona Ghulami are the same person, but i suggest you start with the last code under https://de.math...

más de 3 años hace | 0

Respondida
plotting a signal which has two equations
None of the two if conditions is satisfied for your t-array. Thus the array S_if does not exist after the for-loop - even if you...

más de 3 años hace | 0

Respondida
defining a fitting type
My guess is fitType = @(x,a,b,c,d,f)Even_fit(x,a,b,c,d,f,N); fit(x,y,fitType)

más de 3 años hace | 0

| aceptada

Respondida
Error using sym/coeffs. First argument must be a scalar.
My guess is that VG1_0(1,1) is interpreted as a polynomial in the variable q2_hiz(t). Since your expression does not contain q...

más de 3 años hace | 0

| aceptada