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# How to solve a three-element equation set?

Could you guys do me a favor for solving a equation set?

Z=d/4*(1-SIN(X)/X)
X=8q/(D^2*Y)+SIN(X)
Y=1/n*Z^(2/3)*i^(1/2)

In this equation set, X,Y&Z are the unkown parameters, the others say,
d, q, n&i are known. SO in python, how to program it to represent X, Y
and Z in the form of d, q, n and i?

Thanks very much.
Mar 19 '08 #1
2 1236
purple wrote:
Could you guys do me a favor for solving a equation set?

Z=d/4*(1-SIN(X)/X)
X=8q/(D^2*Y)+SIN(X)
Y=1/n*Z^(2/3)*i^(1/2)

In this equation set, X,Y&Z are the unkown parameters, the others say,
d, q, n&i are known. SO in python, how to program it to represent X, Y
and Z in the form of d, q, n and i?

Hint: make X, Y and Z Python functions.

-- Gerhard
Mar 19 '08 #2
En Wed, 19 Mar 2008 04:05:50 -0300, purple <ya*****@gmail.comescribió:
Could you guys do me a favor for solving a equation set?

Z=d/4*(1-SIN(X)/X)
X=8q/(D^2*Y)+SIN(X)
Y=1/n*Z^(2/3)*i^(1/2)

In this equation set, X,Y&Z are the unkown parameters, the others say,
d, q, n&i are known. SO in python, how to program it to represent X, Y
and Z in the form of d, q, n and i?
You want a numeric result, I presume. SciPy www.scipy.org has several
minimization functions.

--
Gabriel Genellina

Mar 19 '08 #3

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