How does Matlab divide two row vectors by each other to get a scalar?
25 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Osama Tabbakh
le 16 Oct 2019
Commenté : Star Strider
le 8 Oct 2020
Let's consider, A is a vector like shown:
A = [20 30 40];
and B is also a vector:
B = [5 10 20];
when you want to execute this operation:
C = B/A;
then you will get a scalar: 0.4137
if you want to check this answer by doing this:
C.*A
It should be got B again but you will get this vector instead:
ans =
8.2759 12.4138 16.5517
Could somebody explain what's going on?
4 commentaires
Stephen23
le 16 Oct 2019
"It should be got B again"
Can you show us the system of equations for which this statement is true?
Réponse acceptée
Star Strider
le 16 Oct 2019
To expand slightly on that, ‘C’ is the least-squares estimate of the slope of with the y-intercept forced through the origin:
figure
plot(A,B,'p', A,C*A,'-r', [0 A(1)],C*[0 A(1)],':k')
axis([0 45 0 25])
6 commentaires
Timo Tommila
le 8 Oct 2020
Modifié(e) : Timo Tommila
le 8 Oct 2020
awesome, thank you I was wondering the same thing.
Plus de réponses (0)
Voir également
Catégories
En savoir plus sur Calendar 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!