Re: How to index an array with even steps?

From	Akira Li <4kir4.1i@gmail.com>
Subject	Re: How to index an array with even steps?
Date	2014-07-25 16:02 +0400
References	<9160a3c5-ff5f-4fb2-a125-4a1be28438b9@googlegroups.com>
Newsgroups	comp.lang.python
Message-ID	<mailman.12314.1406289784.18130.python-list@python.org> (permalink)

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fl <rxjwg98@gmail.com> writes:
> In Python, ':' is used to indicate range (while in Matlab I know it can be used
> to control steps). How to index an array with 0, 5, 10, 15...995?

Just use slicing:

  >>> L = range(1000) # your array goes here
  >>> L[::5] 
  [0, 5, 10, 15, ..., 995] # Python 2
  range(0, 1000, 5)        # Python 3


--
Akira

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How to index an array with even steps? fl <rxjwg98@gmail.com> - 2014-07-25 04:45 -0700
  Re: How to index an array with even steps? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-07-25 11:55 +0000
  Re: How to index an array with even steps? fl <rxjwg98@gmail.com> - 2014-07-25 04:56 -0700
  Re: How to index an array with even steps? Akira Li <4kir4.1i@gmail.com> - 2014-07-25 16:02 +0400

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