first forward and backward central diference
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi, I have a task to do by diference of those formulas someone help me? input values are specified they get when I have done.
dy1=((f(x+h)-f(x-h))/(h))-1/2*h;
dy2=(((-3*f(x))+4*f(x+h)-f(x+2*h))/(2*h))+1/3*h^2;
dy3=((f(x+h)-f(x-f))/2*h)-1/6*h^2;
3 commentaires
Réponses (2)
Titus Edelhofer
le 23 Avr 2012
Hi,
o.k., let's start with the h:
0:t:10^-5
will be the zero. Start with e.g.
h = 0.01;
Take a look at the chapter about defining functions (or search the doc for "function handles" on how to define f.
Titus
0 commentaires
Walter Roberson
le 23 Avr 2012
Algebra. What is f(x)=(x^2)+3 evaluated at (x+h) ? And at (x-h) ? And so on. Simplify and you get down to a nice formula.
0 commentaires
Voir également
Catégories
En savoir plus sur Matrix Indexing dans Help Center et File Exchange
Produits
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!