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Error using fzero function
I changed v = -4*hp.*A(h)./pi*d^2; %vitesse dans le tuyau to v = -4*hp.*A(h)./(pi*d^2); %vitesse dans le tuyau For bett...

6 Tage ago | 0

Answered
Hi guys this question is on linear programming and i am trying to figure out how to define inequalities with unknown variables.
help linprog and https://de.mathworks.com/matlabcentral/fileexchange/24816-plot_feasible-m

6 Tage ago | 0

Answered
Optimal control problem with integral cost function and both initial and terminal conditions
I think this part % convert symbolic objects to strings for using ’dsolve’ eq1 = strcat('Dx1=',char(Dx1)); %concatena le strin...

7 Tage ago | 0

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Find row with unequal distance
idx = find(diff(diff(A)) > 0,1,'first'); A(idx+2)

7 Tage ago | 0

Answered
Looking for method to simplify equation within MATLAB
syms a b c d X = 2*a+3*b+7*c+d; X = subs(X,d,2*a+4*b)

7 Tage ago | 0

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Answered
ı want to solve this question by excel formulas?
Without guarantee: disbursement = (5000*1.04^23 + 2000*1.04^4*(1.04^19-1)/0.04)/((1.04^4-1)/0.04) thus approximately 18150 $.

7 Tage ago | 1

Answered
Choosing balls from the boxes
positions_red = 1:4; positions_blue = 5:8; positions_green = 9:12; position_black = 13; Ntrials = 1e5; succ...

7 Tage ago | 1

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Answered
Find zero crossings in each row of a matrix (321 x 123 double)
https://de.mathworks.com/matlabcentral/answers/375849-finding-zero-crossings-in-a-signal

7 Tage ago | 0

Answered
How to plot this equation?
fun = @(t,y) 2*y./t - t.^2.*y.^2; t = 0.1:0.1:3; y = 0:0.1:3; [T,Y] = meshgrid(t,y); surf(T,Y,fun(T,Y))

7 Tage ago | 0

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after generating a 4 by 4 random matrix of X on matlab. How do i change X so that all its elements are in the range of 10 to 50
X = 10 + rand(4,4)*(50-10)

8 Tage ago | 0

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Answered
How to plot this equation if C is 4?
fun = @(t,C) 5*t.^2./(t.^5+C); t = 0:0.01:3; C = 4; plot(t,fun(t,C))

8 Tage ago | 0

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Answered
optimization of delayed differential equations (dde)
Make the best of it. pTrue = [1 1 1 1 1 1 1 1 1]; time = 0:7; Y = ...; Am1=[1,1.1,1.4,0.7,0.8,1.6,2,1.5]; Bm1=[1.5,1.0,0....

8 Tage ago | 0

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Answered
Unable to perform assignment because the size of the left side is 1-by-1 and the size of the right side is 1-by-2000.
Setting b01(t) = b01 + gamma(t); b02(t) = b02 + gamma(t); b = b01 + b02; makes b01, b02 and b to arrays of size 1x2000 sinc...

8 Tage ago | 0

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Answered
Hello everyone I'm new, can some help me little bit with my problem. I need to sum free Fourier together.
x = 0:100; F1 = feval(f1,x); F2 = feval(f2,x); F3 = feval(f3,x); SS = F1 + F2 + F3; plot(x,SS) coefficientValues1 = coef...

8 Tage ago | 0

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Answered
Newton Raphson for Backwards Euler on System of differential equations
y0(1,1) = 0; y0(2,1) = 1; x = 0:0.01:2*pi; h = x(2)-x(1); y = zeros(2,numel(x)); y(:,1) = y0; for i4 = 1:...

8 Tage ago | 0

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Answered
How to solve system of trigonometric equations?
Since you have a nonlinear system of equations, you must use a nonlinear solver and not a linear solver as you did: F = @(x,y,z...

8 Tage ago | 0

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Answered
Solving a polynomial function using the solve function is not working
eqn = x^3 - 2*x^2 - 5*x + 6 == 0; solve(eqn,'MaxDegree',3)

8 Tage ago | 0

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What are some Taylor series commands?
https://de.mathworks.com/help/symbolic/sym.taylor.html

8 Tage ago | 0

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Answered
New to MatLab: How to enter given data for a random variable (&find /fit distribution function)
n = 30; sample = random(n) function sample = random(n) uniform = rand(n,1); sample = zeros(size(uniform)); for i = ...

8 Tage ago | 0

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I need help with fourier matrix index integral, I can't find how to write it in matlab
n = 50; T=20*10^-3; t=0:T/1000:T; w=2*pi*1/T; f=@(t)0+100.*(t>1*T/12).*(t<5*T/12)-100.*(t>7*T/12).*(t<11*T/12); a0 = 2/T*in...

9 Tage ago | 1

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Answered
How to solve this differential equation inside derivation are there
Execute this code separately and copy the expressions obtained for az1 and bz1 into your code from above. If you want more vari...

9 Tage ago | 0

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how to plot solution of ODE eqution with out using fplot ?
Vsol = matlabFunction(VSol); t = 0:0.001:5; plot(t,Vsol(t))

9 Tage ago | 0

Answered
Volume Monte Carlo Method
I'm surprised that the sphere is characterized as sphere = @(X) heaviside(ones(size(X,1),1) - X(:,1).*X(:,2).*X(:,3)); For me ...

9 Tage ago | 0

Answered
How i can solve limit this ODE question .
I think you mean lim (t->oo) P(t) instead of lim (x->oo) P(t) don't you ? Seems the limit is not 0, but 1e6: https://www....

9 Tage ago | 0

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three curve at different x values
plot(x(x<=41.1),blue_curve(x<=41.1))

9 Tage ago | 0

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Answered
Plotting the transient temperature profile of a 2D grid using finite-difference solver
Order the temperatures in the grid points (e.g. T11, T12,T13,...,T1_nx,T21,T22,...,T2_nx,...,T_ny,1,T_ny,2,...T_ny,nx). Write...

10 Tage ago | 0

Answered
Probability distribution (between zero and 1)
Figure 2 with the ksdensity command is exactly what you need. The y-axis never represents probability in the plot of probabilit...

10 Tage ago | 0

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How to use for loop to iterate over the elements of the initial matrix and keep just the ones in the diagonal.
D =[R(1,1);R(2,2);R(3,3)] or D = zeros(3,1); for i=1:3 D(i) = R(i,i); end What's the problem ?

11 Tage ago | 1

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Answered
Fourier coefficients of a function
syms x omega n f = 0.5*(sin(x)+abs(sin(x))); F(omega) = int(f*exp(1i*omega*x),x,-pi,pi) n = 10; g = real(F(0))/(2*pi) + sum(...

11 Tage ago | 0

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Implementation of 2D advection equation with second order upwind scheme?
Formally, your implementation is correct as it is (I did not check the one-sided difference formulae in detail). The problems I...

11 Tage ago | 0

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