Elementwise multiplication, function definition
5 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello Community
I have an issue defining a function where the input is a meshgrid. Somehow there must be an issue with the elementwise multiplication.
Input: [x, y] = meshgrid(linspace(0,400,400),linspace(0,30000,400));
A1 = -8.269000000000000;
m1 = 2.071000000000000;
m2 = 0.239700000000000;
B1 = -13.100000000000000;
n1 = 2.813000000000000;
B2 = -49.960000000000001;
n2 = 18.170000000000002;
z1 = (10^A1*x.^m1*y.^m2+y.*(10^B1*x.^n1+10^B2*x.^n2))*100;
Output:
min(min(z1)) = 188.7492
Conclusion:
The minimal value of z1 is 188.7492. However looking at the equation, z1 should be 0 for x = 0 and y = 0.
Somehow there is a mistake writing the equation oder defining input (x,y)
Can anybody help me?
0 commentaires
Réponse acceptée
Iman Ansari
le 17 Mai 2013
[x, y] = meshgrid(linspace(0,400,400),linspace(0,30000,400));
A1 = -8.269000000000000;
m1 = 2.071000000000000;
m2 = 0.239700000000000;
B1 = -13.100000000000000;
n1 = 2.813000000000000;
B2 = -49.960000000000001;
n2 = 18.170000000000002;
z1 = (10^A1*x.^m1.*y.^m2+y.*(10^B1*x.^n1+10^B2*x.^n2))*100;
min(min(z1))
Plus de réponses (1)
David Sanchez
le 17 Mai 2013
Hi, try your code like this:
[x, y] = meshgrid( linspace(0,400,400),linspace(0,30000,400) );
A1 = -8.269000000000000;
m1 = 2.071000000000000;
m2 = 0.239700000000000;
B1 = -13.100000000000000;
n1 = 2.813000000000000;
B2 = -49.960000000000001;
n2 = 18.170000000000002;
AA = 10^A1;
BB = x.^m1;
CC = y.^m2;
z1_1 = AA.*BB.*CC;
DD = 10^B1;
EE = x.^n1;
FF = 10^B2;
GG = x.^n2;
z1_2 = y.*( DD*EE + FF*GG );
z1 = ( z1_1 + z1_2 )*100;
2 commentaires
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!