Differences Between Arrays and Matrices in Numpy

Robert Kern robert.kern at gmail.com
Wed Jul 29 16:36:03 EDT 2009


On 2009-07-29 15:23, Nanime Puloski wrote:
> What are some differences between arrays and matrices using the Numpy
> library? When would I want to use arrays instead of matrices and vice
> versa?

You will want to ask numpy questions on the numpy mailing list:

   http://www.scipy.org/Mailing_Lists

An overview of how the matrix subclass differs from ndarray, see the documentation:

   http://docs.scipy.org/doc/numpy/reference/arrays.classes.html#matrix-objects

Basically, I suggest that you just use regular arrays always. There is a 
syntactical convenience to matrix objects, but it does cause incompatibilities 
with the majority of code that is written for regular arrays. The convenience is 
usually not worth the cost.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco




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