CODEWITHSUNDEEP
numpymatplotlib
Aseem Awad
Aseem Awad

Reputation: 183

A rather strange occurrence with pylab:

I typed in my IDLE (python 2.7.8 Windows 64bit) the following line after importing pylab as pl:

import pylab as pl
pl.ndarray([3,2,1])

producing this:

array([[[  7.89725907e-316],
        [  7.83323137e-316]],

       [[  1.52244036e-316],
        [  8.00633853e-316]],

       [[  8.59792562e-316],
        [  8.20678215e-316]]])

Why has this happened?

Upvotes: 0

Views: 24

Answers (1)

David Zwicker
David Zwicker

Reputation: 24278

ndarray is the class underlying numpy arrays. It's not meant to call to construct arrays. Use pl. array([3, 2, 1]) instead.

The ndarray docstring says:

ndarray(shape, dtype=float, buffer=None, offset=0, strides=None, order=None)

An array object represents a multidimensional, homogeneous array of fixed-size items. An associated data-type object describes the format of each element in the array (its byte-order, how many bytes it occupies in memory, whether it is an integer, a floating point number, or something else, etc.)

Arrays should be constructed using array, zeros or empty (refer to the See Also section below). The parameters given here refer to a low-level method (ndarray(...)) for instantiating an array.

Upvotes: 2

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