how to find the ansers for an elliptic integral.
1 vue (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Prashanth Chandrasekar
le 3 Fév 2014
Commenté : Walter Roberson
le 3 Fév 2014
I am prashanth doing a project using matlab.I am new to matlab.I want to know how to interpret an elliptic integral and how to solve an elliptic integral in matlab. My equation is as follows.
Input: syms a b phi
int((1/(sqrt(1-(((2*b)/(a+b))^2)*(sin((pi/4)-(phi/2))^2)))), phi)
Ans:(-2)*ellipticF(pi/4 - phi/2, (4*b^2)/(a + b)^2)
I want to know how the answer has to be interpreted and use in the following steps.
Thanx in advance.
0 commentaires
Réponse acceptée
Walter Roberson
le 3 Fév 2014
You need to subs() particular values for "a" and "b" and "phi" into the answer before the value of the elliptic integral can be calculated. For example,
double( subs(Ans, {a, b, phi}, {3, 4, pi/3}) )
2 commentaires
Walter Roberson
le 3 Fév 2014
EIAns = matlabFunction( subs(Ans, {a, b}, {3, 4}) ); %use appropriate a b
EI_equals = 0.3183; %whatever you need the integral to come out as if you had the correct phi
rightphi = fzero( @(phi) EIAns(phi) - EI_equals, [0 2*pi]);
Plus de réponses (0)
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!