尝试拟合线条时出现“不正确的输入：N=2 不得超过 M=1”错误

如何解决尝试拟合线条时出现“不正确的输入：N=2 不得超过 M=1”错误

代码是将两个单独的数据分成两条单独的直线并确定哪个配置最适合

def straight_line(x,m,c):
 return  m*x + c

def sep_point(x,y):
  seperation = 2
  r_sqr = []

  while seperation < len(x):
    
    x_1 = x[:seperation]
    y_1 = y[:seperation]
    x_2 = x[seperation:]
    y_2 = y[seperation:]
    
    popt_1,pcov_1 = curve_fit(straight_line,x_1,y_1) 
    popt_2,pcov_2 = curve_fit(straight_line,x_2,y_2)
    
    res_1 = y_1 - straight_line(x_1,*popt_1)
    res_2 = y_2 - straight_line(x_2,*popt_2)
    
    res_sqr_1 = np.sum(res_1**2)
    res_sqr_2 = np.sum(res_2**2)
    
    ss_1 = np.sum((y_1-np.mean(y_1))**2)
    ss_2 = np.sum((y_2-np.mean(y_2))**2)
    
    r_sqr_1 = 1 - (res_sqr_1 / ss_1)
    r_sqr_2 = 1 - (res_sqr_2 / ss_2)
    
    r_sqr.append(r_sqr_1 * r_sqr_2)
    seperation += 1
  return (r_sqr)

然后我得到这个回溯错误

TypeError                                 Traceback (most recent call last)
<ipython-input-42-638d4928b679> in <module>
----> 1 test = sep_point(decelleration_voltage[:-1],lnRevColdShieldI[:-1])

 <ipython-input-41-7aa65ea99d01> in sep_point(x,y)
      10 
      11         popt_1,y_1)
 ---> 12         popt_2,y_2)
      13 
      14         res_1 = y_1 - straight_line(x_1,*popt_1)

~\Anaconda3\lib\site-packages\scipy\optimize\minpack.py in curve_fit(f,xdata,ydata,p0,sigma,absolute_sigma,check_finite,bounds,method,jac,**kwargs)
742         # Remove full_output from kwargs,otherwise we're passing it in twice.
743         return_full = kwargs.pop('full_output',False)
--> 744         res = leastsq(func,Dfun=jac,full_output=1,**kwargs)
745         popt,pcov,infodict,errmsg,ier = res
746         cost = np.sum(infodict['fvec'] ** 2)

~\Anaconda3\lib\site-packages\scipy\optimize\minpack.py in leastsq(func,x0,args,Dfun,full_output,col_deriv,ftol,xtol,gtol,maxfev,epsfcn,factor,diag)
385     m = shape[0]
386     if n > m:
--> 387         raise TypeError('Improper input: N=%s must not exceed M=%s' % (n,m))
388     if epsfcn is None:
389         epsfcn = finfo(dtype).eps

TypeError: Improper input: N=2 must not exceed M=1

（注意：输入的最后一段数据被截断以停止一个不起作用的'inf'值