Strange (lack of) round-off error using norm
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello,
I have found this behaviour:
>> format hex
>> p=[sqrt(2) sqrt(2)]*1e3;
>> sqrt(sum(p.^2))
ans =
409f400000000001
>> norm(p)
ans =
409f400000000000
I understand the round-off error using sqrt. What I do not understand is how does norm do to avoid it.
Thanks,
Mariano
2 commentaires
David Goodmanson
le 17 Fév 2019
Hi Mariano
I ran this on my PC and got
ans = 409f400000000001
ans = 409f400000000001
Not sure what to say .....
Réponses (1)
Voir également
Catégories
En savoir plus sur Matrices and Arrays 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!