Exception： LinAlgError和Intel MKL ERROR: Parameter 6 was incorrect on entry to DGELSD【已解决】

问题描述

运行程序，处理到某个数据时候报错：

Exception has occurred: LinAlgError
SVD did not converge in Linear Least Squares
  File "E:\matlab\CHB-MIT-DATA\epilepsy_eeg_classification\pyeeg.py", line 692, in hurst
    [m, c] = numpy.linalg.lstsq(A, R_S)[0]
  File "E:\matlab\CHB-MIT-DATA\epilepsy_eeg_classification\preprocessing.py", line 50, in eeg_features
    res[10] = pyeeg.hurst(data)                                                   # Hurst exponent
  File "E:\matlab\CHB-MIT-DATA\epilepsy_eeg_classification\preprocessing.py", line 88, in eeg_preprocessing
    features.extend(eeg_features(temp[i]).tolist())
  File "E:\matlab\CHB-MIT-DATA\epilepsy_eeg_classification\preprocessing.py", line 334, in <module>
    res = eeg_preprocessing(file, seizures)
numpy.linalg.LinAlgError: SVD did not converge in Linear Least Squares

terminal报错如下：

e:\matlab\CHB-MIT-DATA\epilepsy_eeg_classification\pyeeg.py:620: FutureWarning: `rcond` parameter will change to the default of machine precision times ``max(M, N)`` where M and N are the input matrix dimensions.
To use the future default and silence this warning we advise to pass `rcond=None`, to keep using the old, explicitly pass `rcond=-1`.     
  (p, _, _, _) = numpy.linalg.lstsq(x, L)
e:\matlab\CHB-MIT-DATA\epilepsy_eeg_classification\pyeeg.py:688: RuntimeWarning: invalid value encountered in true_divide
  R_S = R_T / S_T
e:\matlab\CHB-MIT-DATA\epilepsy_eeg_classification\pyeeg.py:692: FutureWarning: `rcond` parameter will change to the default of machine precision times ``max(M, N)`` where M and N are the input matrix dimensions.
To use the future default and silence this warning we advise to pass `rcond=None`, to keep using the old, explicitly pass `rcond=-1`.     
  [m, c] = numpy.linalg.lstsq(A, R_S)[0]
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Intel MKL ERROR: Parameter 6 was incorrect on entry to DGELSD.
Backend Qt5Agg is interactive backend. Turning interactive mode on.
 
FutureWarning: `rcond` parameter will change to the default of machine precision times ``max(M, N)`` where M and N are the input matrix dimensions.
To use the future default and silence this warning we advise to pass `rcond=None`, to keep using the old, explicitly pass `rcond=-1`.     
  (p, _, _, _) = numpy.linalg.lstsq(x, L)
e:\matlab\CHB-MIT-DATA\epilepsy_eeg_classification\pyeeg.py:688: RuntimeWarning: invalid value encountered in true_divide
  R_S = R_T / S_T
e:\matlab\CHB-MIT-DATA\epilepsy_eeg_classification\pyeeg.py:692: FutureWarning: `rcond` parameter will change to the default of machine precision times ``max(M, N)`` where M and N are the input matrix dimensions.
To use the future default and silence this warning we advise to pass `rcond=None`, to keep using the old, explicitly pass `rcond=-1`.   

解决方案

方法1：

有人说numpy1.19.3在linux上起作用，numpy1.19.4在Windows上起作用。因此我把原来的numpy卸载，重装numpy1.19.4。

pip uninstall numpy
 
pip install numpy==1.19.4

 原来的numpy是1.21.5版本的。

python - LinAlgError：尝试 polyfit 时 SVD 未在线性最小二乘中收敛 - 堆栈内存溢出

安装1.19.4时候虽然报错了，但是成功安装：

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
tensorflow 1.14.0 requires tensorflow-estimator<1.15.0rc0,>=1.14.0rc0, but you have tensorflow-estimator 2.4.0 which is incompatible.     
Successfully installed numpy-1.19.4

 我通过降低了numpy版本的方式解决了这个问题，不知道这个方法对你是否有借鉴意义。