Error Using Solve Function
2 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Hello there,
I'm getting an error using the solve function. What is the reason for this and how do we correct it? See below.
Q = 5; s_0 = 0.005; n = 0.02; L = 35; k_e = 0.5; C_D = 0.65; H = 4; g = 9.81;
syms D deltaH
A = pi*D^2/4;
V = Q/A;
R_H = D/4;
eqn1 = deltaH == H - D + L*s_0;
eqn2 = deltaH == (k_e + 2*g*n^2*L/R_H^(4/3) + 1)*(Q^2/(2*g*A^2));
deltaH = double(solve(eqn1 == eqn2, D,"Real",true))
Thanks very much,
Brian
7 comentarios
darova
el 1 de Mayo de 2020
What about this
[deltaH, D] = vpasolve(eqn1 == eqn2, [deltaH, D],[2 1])
deltaH =
1.1885695516004419959725632337124
D =
2.0
[deltaH, D] = vpasolve(eqn1 == eqn2, [deltaH, D],[2 4])
deltaH =
4.1628911435565798210779440646728
D =
2.0
Respuestas (0)
Ver también
Categorías
Más información sobre Equation Solving en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!