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I'm using numpy.polyfit and the following error occurs: 

Intel MKL ERROR: Parameter 4 was incorrect on entry to DGELSD.
C:\Users\Max.Kaye\AppData\Local\Enthought\Canopy\User\lib\site-packages\numpy\lib\polynomial.py:594: RankWarning: Polyfit may be poorly conditioned 
warnings.warn(msg, RankWarning)

Does anyone know what the problem is?

Thanks in advance, Max

M Kaye
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  • Perhaps see [this thread](http://stackoverflow.com/questions/24173301/numpy-polyfit-suppress-printing-of-intel-mkl-error-message). Particularly @Nim J's comment saying that your error "occurs when you have Nan or Inf value in your input. Please check and impute it." – nbryans Feb 02 '17 at 17:56
  • That said, to better answer it may be necessary to see the code around your call to polyfit. – nbryans Feb 02 '17 at 17:58
  • The problem is that I want the result to write to a csv file, but it merely returns blanks when doing so. The code is part of a loop so I shall try and extract the eronous entries today – M Kaye Feb 03 '17 at 09:09

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