Unable to find explicit solution
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I tried solving an equation as shown below, and I was constantly getting this error - "Warning: Unable to find explicit solution. For options, see help". I am not able to understand what else to try, I wish to solve for 'y' and I have values for the other parameters, vf, a, x , m and psi predefined. How do I rectify this error?
syms psi x y vf a m
psi = 0.1;
r = 0.3;
a = r;
m = 1;
x = linspace(-10*r,10*r);
eqn = psi == norm(vf)*(y+m*atan2(y,x+a)-m*atan2(y,x-a));
sol = solve(simplify(eqn),y,'Real', true,'IgnoreAnalyticConstraints', true) ;
2 commentaires
darova
le 14 Juin 2020
Did you try vpasolve or fsolve? I think solve can't handle it, it's complicated
Try numerical approach
Réponses (1)
Walter Roberson
le 14 Juin 2020
You are trying to solve for a single y value that satisfies all 100 equations simultaneously. That cannot work. You need to solve each of the equations independently:
syms psi x y vf a m
psi = 0.1;
r = 0.3;
a = r;
m = 1;
x = linspace(-10*r,10*r);
eqn = simplify(psi == norm(vf)*(y+m*atan2(y,x+a)-m*atan2(y,x-a)));
sol = arrayfun(@(EQN) solve(EQN,y,'Real', false,'IgnoreAnalyticConstraints', true), eqn, 'uniform', 0);
... This still will not be able to find the solutions, but that is because there is no solution for general vf
0 commentaires
Voir également
Catégories
En savoir plus sur Calculus dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!