I have a equation given below, I need to solve this equaiton in matlab and find base X,Y,Z . There is solution given.
In matlab, I try to setup base but I cant figure out exactly. How I setup this equation in Matlab ? Thanks for help.
My matlab code for design base of the equation :
clear; clc;
[0 1 1^-1 ] % B*C^(-1)
[0 1 0] % B
[1 1^-3 0] %A*B^-3
[0 1^3 1^-1] %B^3*C^-1

 Réponse acceptée

syms A B C
syms X Y Z integer
eqn = (B*C^-1)^X * (B)^Y * (A*B^-3)^Z * (B^3*C^-1) == A^0*B^0*C^0
eqn = 
seqn = simplify(lhs(eqn)) == simplify(rhs(eqn))
seqn = 
collect(lhs(seqn),C)
ans = 
powers = findSymType(ans, 'power')
powers = 
need_to_solve = arrayfun(@(expression) children(expression,2), powers)
need_to_solve = 
syms X Y Z %remove assumptions
sol = solve(need_to_solve)
sol = struct with fields:
X: -1 Y: -2 Z: 0

4 commentaires

Vatan Tosun
Vatan Tosun le 16 Jan 2022
Thank you very much!
Could you write answer in this form:
Thanks!
Walter Roberson
Walter Roberson le 16 Jan 2022
You might be able to get somewhere using displayFormula https://www.mathworks.com/help/symbolic/displayformula.html
jack london
jack london le 17 Jan 2022
Hi again,
When I run code on my matlab R2021a the output is:
Gıves this format, how I convert to numeric values (X=-1 Y=-2 Z=0)
Walter Roberson
Walter Roberson le 17 Jan 2022
Modifié(e) : Walter Roberson le 17 Jan 2022
X = double(sol.X)
Y = double(sol.Y)
Z = double(sol.Z)
Remember though that if you are using displayFormula, then what it prefers is character values -- which would be from char(sol.X) or string(sol.X) rather than double(sol.X)

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Plus de réponses (1)

Matt J
Matt J le 15 Jan 2022
Modifié(e) : Matt J le 15 Jan 2022
LHS=[0 0 1;
-1 0 0;
1 1 -3];
RHS=[0;1;-3];
XYZ=LHS\RHS
XYZ = 3×1
-1 -2 0

1 commentaire

jack london
jack london le 16 Jan 2022
Thansk for answer.
I dont understant what represents LHS and RHS, could you give more detail please

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