別のオプションは、lmfitを使用することです。
彼らはあなたが始めるための素晴らしい例を提供します:.
#!/usr/bin/env python
#<examples/doc_basic.py>
from lmfit import minimize, Minimizer, Parameters, Parameter, report_fit
import numpy as np
# create data to be fitted
x = np.linspace(0, 15, 301)
data = (5. * np.sin(2 * x - 0.1) * np.exp(-x*x*0.025) +
np.random.normal(size=len(x), scale=0.2) )
# define objective function: returns the array to be minimized
def fcn2min(params, x, data):
""" model decaying sine wave, subtract data"""
amp = params['amp']
shift = params['shift']
omega = params['omega']
decay = params['decay']
model = amp * np.sin(x * omega + shift) * np.exp(-x*x*decay)
return model - data
# create a set of Parameters
params = Parameters()
params.add('amp', value= 10, min=0)
params.add('decay', value= 0.1)
params.add('shift', value= 0.0, min=-np.pi/2., max=np.pi/2)
params.add('omega', value= 3.0)
# do fit, here with leastsq model
minner = Minimizer(fcn2min, params, fcn_args=(x, data))
kws = {'options': {'maxiter':10}}
result = minner.minimize()
# calculate final result
final = data + result.residual
# write error report
report_fit(result)
# try to plot results
try:
import pylab
pylab.plot(x, data, 'k+')
pylab.plot(x, final, 'r')
pylab.show()
except:
pass
#<end of examples/doc_basic.py>