Effacer les filtres
Effacer les filtres

I would like to get the b value in Matalb.

6 vues (au cours des 30 derniers jours)
Redwood
Redwood le 16 Mai 2013
Dear Matlab experts,
I would like to get the b value in Matlab, but I got nothing in Matlab. I attached my coding below. Please let me know how to get the b value.
syms b G G1 M1 M2 M3 P1 P2 P3
b = 0:.0001:10;
Out=solve(' G1 == G*(P1*exp(-b*M1/P1)/( P1*exp(-b*M1/P1)+ P2*exp(-b*M2/P2) + P3*exp(-b*M3/P3)))', b)
G = [7340, 7194];
G1 = [4516.881, 5002.953];
M1 = [5222.328, 6009.419];
M2 = [3264.034, 2632.621];
M3 = [1264.034, 1632.621];
P1 = [3000, 3025];
P2 = [10000, 10051];
P3 = [5000, 5051];
Out=subs(Out)
Thank you very much in advance.
Sincerely,
Redwood

Réponses (4)

Walter Roberson
Walter Roberson le 16 Mai 2013
Use
syms b
instead of assigning a numeric value to b.

Redwood
Redwood le 16 Mai 2013
Dear Walter,
Thank you very much for your help.
I already used syms b.
But I did not get anything in Matlab.
Sincerely yours,
Redwood
  1 commentaire
Walter Roberson
Walter Roberson le 16 Mai 2013
Is there reason to expect that there is an algebraic solution? If not then you are going to have to do the substitution first and then do a numeric solution. You will likely have to do each set of values individually rather than the two sets together.

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sami
sami le 16 Mai 2013
inner matrix must agree

Redwood
Redwood le 16 Mai 2013
Dear Sami,
What do you mean, "inner matrix must agree"?
Sincerely yours,
Redwood

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