[SciPy-User] [SciPy-user] Error using fmin

Hjalti Sigurjónsson hjalti@vatnaskil...
Wed Feb 22 07:49:34 CST 2012

Seems that z_den_s is not defined

In [20]: Traug(vO)
NameError                                 Traceback (most recent call last)
/home/hjalti/<ipython-input-20-8d295902530d> in <module>()
----> 1 Traug(vO)

/home/hjalti/<string> in Traug(v)

NameError: global name 'z_den_s' is not defined

-----Original Message-----
From: scipy-user-bounces@scipy.org [mailto:scipy-user-bounces@scipy.org] On Behalf Of RDX
Sent: 22. febrúar 2012 13:42
To: scipy-user@scipy.org
Subject: [SciPy-User] [SciPy-user] Error using fmin

I am using fmin and it returns initial guess as the final solution.   

def Traug (v): 
    Traug_RHOB = v[0] + v[1]*(z_den_s/3125.0)**v[2] 
    count =arange(size(den_s)) 
    for i in count: 
        err += abs(den_s[i] - Traug_RHOB [i]) 
    return err 

vO=[1.6, 0.5, 0.35] 
t=fmin(Traug,vO ) 
a=t[0]; b=t[1]; c=t[2]; 

Code gives me a=1.6, b=0.5, c=0.35, which is my initial guess. 

What is wrong? Many thanks in advance. 


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