我正在尝试使用lmfit
使某些模型适合我的数据。请参阅下面的MWE:
import lmfit
import numpy as np
def lm(params,x):
slope = params['slope']
interc = params['interc']
return interc + slope * x
def lm_min(params,x,data):
y = lm(params,x)
return data - y
x = np.linspace(0,100,1000)
y = lm({'slope':1,'interc':0.5},x)
ydata = y + np.random.randn(1000)
params = lmfit.Parameters()
params.add('slope',2)
params.add('interc',1)
fitter = lmfit.Minimizer(lm_min,params,fcn_args=(x,ydata),fit_kws={'xatol':0.01})
fit = fitter.minimize(method='nelder')
为了尽早完成(准确性现在不是最重要的事情),我想更改停止拟合的标准。基于docs和对SO的一些搜索,我尝试提供一些关键字参数(在下面的行中为fit_kws
),这些参数将传递给所使用的最小化器。我也尝试使用kws
和**{'xatol':0.01}
。紧接着,我还在最后一行称为fitter.minimize()
的行中尝试了上述选项。但是,在所有情况下,我都会得到一个TypeError
,说它得到了意外的关键字参数:
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
~/STACK/WUR/PhD/Experiments/microclimate experiment/Scripts/Fluctuations/mwe.py in <module>()
25
26 fitter = lmfit.Minimizer(lm_min,fit_kws={'xatol':0.01})
---> 27 fit = fitter.minimize(method='nelder')
28
~/anaconda3/envs/py/lib/python3.6/site-packages/lmfit/minimizer.py in minimize(self,method,**kws)
1924 val.lower().startswith(user_method)):
1925 kwargs['method'] = val
-> 1926 return function(**kwargs)
1927
1928
~/anaconda3/envs/py/lib/python3.6/site-packages/lmfit/minimizer.py in scalar_minimize(self,**kws)
906 else:
907 try:
--> 908 ret = scipy_minimize(self.penalty,variables,**fmin_kws)
909 except AbortFitException:
910 pass
TypeError: minimize() got an unexpected keyword argument 'fit_kws'
有人知道我如何为特定的求解器添加关键字参数吗?
版本信息:
python:3.6.9
scipy:1.3.1
lmfit:0.9.12