Path: csiph.com!v102.xanadu-bbs.net!xanadu-bbs.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.freenet.ag!takemy.news.telefonica.de!telefonica.de!newsfeed.xs4all.nl!newsfeed2.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'python,': 0.02; 'programmer': 0.03; 'converts': 0.09; 'data:': 0.09; 'received:80.91': 0.09; 'received:80.91.229': 0.09; 'received:gmane.org': 0.09; 'received:list': 0.09; 'python': 0.11; 'jan': 0.12; 'language,': 0.12; 'wrote': 0.14; 'mostly': 0.14; 'csv': 0.16; 'digits.': 0.16; 'document)': 0.16; 'modules,': 0.16; 'received:80.91.229.3': 0.16; 'received:plane.gmane.org': 0.16; 'reedy': 0.16; 'rounding': 0.16; 'subject:CSV': 0.16; 'which,': 0.16; 'language': 0.16; 'wrote:': 0.18; 'code.': 0.18; 'example': 0.22; 'header:User-Agent:1': 0.23; 'file.': 0.24; "i've": 0.25; 'header:X-Complaints-To:1': 0.27; 'header:In-Reply-To:1': 0.27; '(this': 0.29; 'dropped': 0.31; 'there.': 0.32; 'run': 0.32; '"the': 0.34; 'something': 0.35; 'next': 0.36; 'should': 0.36; 'so,': 0.37; 'to:addr:python-list': 0.38; 'pm,': 0.38; 'use.': 0.39; 'to:addr:python.org': 0.39; 'received:org': 0.40; 'how': 0.40; 'new': 0.61; 'numbers': 0.61; 'first': 0.61; 'back': 0.62; 'decided': 0.64; 'love': 0.65; 'skip:1 20': 0.65; 'export': 0.74; 'analysis': 0.75; 'noise': 0.84; 'received:fios.verizon.net': 0.84; 'received:108': 0.93 X-Injected-Via-Gmane: http://gmane.org/ To: python-list@python.org From: Terry Reedy Subject: Re: CSV methodology Date: Sun, 14 Sep 2014 03:02:12 -0400 References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Gmane-NNTP-Posting-Host: pool-108-16-203-145.phlapa.fios.verizon.net User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 In-Reply-To: X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 38 NNTP-Posting-Host: 2001:888:2000:d::a6 X-Trace: 1410678164 news.xs4all.nl 2852 [2001:888:2000:d::a6]:43473 X-Complaints-To: abuse@xs4all.nl Xref: csiph.com comp.lang.python:77861 On 9/13/2014 9:34 PM, jetrn@newsguy.com wrote: > > Hello. Back in the '80s, I wrote a fractal generator, which, over the years, > I've modified/etc to run under Windows. I've been an Assembly Language > programmer for decades. Recently, I decided to learn a new language, > and decided on Python, and I just love it, and the various IDEs. > > Anyway, something I thought would be interesting, would be to export > some data from my fractal program (I call it MXP), and write something > in Python and its various scientific data analysis and plotting modules, > and... well, see what's in there. First you need to think about (and document) what your numbers mean and how they should be organized for analysis. > An example of the data: > 1.850358651774470E-0002 Why is this so smaller than the next numbers. Are all those digits significant, or are they mostly just noise -- and best dropped by rounding the number to a few significant digits. > 32 > 22 > 27 > ... (this format repeats) After exactly 3 numbers in this range? > So, I wrote a procedure in MXP which converts "the data" and exports > a csv file. Answer the questions above before writing code. .csf is likely not the best format to use. -- Terry Jan Reedy