Numpy - Revision history

Admin at 09:19, 16 April 2017

2017-04-16T09:19:21Z

← Older revision		Revision as of 09:19, 16 April 2017
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	Sometimes you want to initalize an empty array, which is a really inefficient use of memory for large matrices but you could care less if it's a dozen items.		Sometimes you want to initalize an empty array, which is a really inefficient use of memory for large matrices but you could care less if it's a dozen items.

	<~~source lang="python"~~>		<pre>
	# You can initialize an array with []:		# You can initialize an array with []:

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	In [74]: x		In [74]: x
	Out[74]: array([ 1., 2., 3.])		Out[74]: array([ 1., 2., 3.])
	</~~source~~>		</pre>



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Admin at 07:17, 16 April 2017

2017-04-16T07:17:27Z

← Older revision		Revision as of 07:17, 16 April 2017
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Admin at 07:16, 16 April 2017

2017-04-16T07:16:55Z

← Older revision		Revision as of 07:16, 16 April 2017
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	Out[74]: array([ 1., 2., 3.])		Out[74]: array([ 1., 2., 3.])
	</source>		</source>



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Admin at 19:28, 28 July 2013

2013-07-28T19:28:31Z

← Older revision		Revision as of 19:28, 28 July 2013
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	<source lang="python">		<source lang="python">
			# You can initialize an array with []:

	In [62]: x=[]		In [62]: x=[]

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	In [64]: x		In [64]: x
	Out[64]: array([], dtype=float64)		Out[64]: array([], dtype=float64)

			# to be more direct about it,

	In [66]: x = np.array([],dtype=np.float64)		In [66]: x = np.array([],dtype=np.float64)
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	In [67]: x		In [67]: x
	Out[67]: array([], dtype=float64)		Out[67]: array([], dtype=float64)

			# Now you can append to the empty array

			In [71]: x = append(x,1)

			In [72]: x = append(x,2)

			In [73]: x=append(x,3)

			In [74]: x
			Out[74]: array([ 1., 2., 3.])
	</source>		</source>

Admin at 19:27, 28 July 2013

2013-07-28T19:27:30Z

← Older revision		Revision as of 19:27, 28 July 2013
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	==Initializing an empty array==		==Initializing an empty array==

	~~From~~		Sometimes you want to initalize an empty array, which is a really inefficient use of memory for large matrices but you could care less if it's a dozen items.

	<source lang="python">		<source lang="python">

Admin: Created page with "=Arrays= ==Initializing an empty array== From In [62]: x=[] In [63]: x=np.array(x) In [64]: x Out[64]: array([], dtype=float64) In [66]: x = np.arra..."

2013-07-28T19:26:17Z

Created page with "=Arrays= ==Initializing an empty array== From <source lang="python"> In [62]: x=[] In [63]: x=np.array(x) In [64]: x Out[64]: array([], dtype=float64) In [66]: x = np.arra..."

New page

=Arrays=

==Initializing an empty array==

From

<source lang="python">
In [62]: x=[]

In [63]: x=np.array(x)

In [64]: x
Out[64]: array([], dtype=float64)

In [66]: x = np.array([],dtype=np.float64)

In [67]: x
Out[67]: array([], dtype=float64)
</source>