Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #36303

Re: Numpy outlier removal

Path csiph.com!newsfeed.hal-mli.net!feeder3.hal-mli.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!nntp-feed.chiark.greenend.org.uk!ewrotcd!news.nosignal.org!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path <python@mrabarnett.plus.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.003
X-Spam-Evidence '*H*': 0.99; '*S*': 0.00; 'value,': 0.03; 'modify': 0.05; 'processed': 0.05; 'say,': 0.05; 'dict': 0.09; 'iterate': 0.09; 'keyed': 0.09; 'deletions': 0.16; 'from:addr:mrabarnett.plus.com': 0.16; 'from:addr:python': 0.16; 'from:name:mrab': 0.16; 'include.': 0.16; 'integers.': 0.16; 'keys:': 0.16; 'message-id:@mrabarnett.plus.com': 0.16; 'numpy': 0.16; 'received:84.93': 0.16; 'received:84.93.230': 0.16; 'wrote:': 0.17; 'assuming': 0.22; 'idea': 0.24; 'header:In-Reply- To:1': 0.25; 'header:User-Agent:1': 0.26; 'common': 0.26; 'values': 0.26; 'dictionary': 0.29; 'exclude': 0.29; 'received:192.168.1.3': 0.29; 'array': 0.29; 'returned': 0.30; 'generally': 0.32; 'received:84': 0.32; 'running': 0.32; 'problem': 0.33; 'to:addr:python-list': 0.33; 'skip:d 20': 0.34; 'text': 0.34; 'list': 0.35; 'display': 0.36; 'bad': 0.37; 'data': 0.37; 'subject:: ': 0.38; 'delete': 0.38; 'to:addr:python.org': 0.39; 'received:192': 0.39; 'where': 0.40; 'received:192.168': 0.40; 'your': 0.60; 'relationship': 0.60; 'remove': 0.61; 'to,': 0.65; 'header:Reply-To:1': 0.68; 'reply-to:no real name:2**0': 0.72; 'reply-to:addr:python.org': 0.84; 'subject:removal': 0.84; 'average': 0.93
X-CM-Score 0.00
X-CNFS-Analysis v=2.0 cv=HO4d4PRv c=1 sm=1 a=0nF1XD0wxitMEM03M9B4ZQ==:17 a=O2Kvzccb_dQA:10 a=ihvODaAuJD4A:10 a=OUOv7kDek9cA:10 a=8nJEP1OIZ-IA:10 a=EBOSESyhAAAA:8 a=8AHkEIZyAAAA:8 a=9mgJdUYtfwEA:10 a=1g6k1cUcj4sHB4xldzgA:9 a=wPNLvfGTeEIA:10 a=0nF1XD0wxitMEM03M9B4ZQ==:117
X-AUTH mrabarnett:2500
Date Sun, 06 Jan 2013 23:18:43 +0000
From MRAB <python@mrabarnett.plus.com>
User-Agent Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/17.0 Thunderbird/17.0
MIME-Version 1.0
To python-list@python.org
Subject Re: Numpy outlier removal
References <mailman.179.1357501521.2939.python-list@python.org> <50e9fbd5$0$6848$e4fe514c@news2.news.xs4all.nl>
In-Reply-To <50e9fbd5$0$6848$e4fe514c@news2.news.xs4all.nl>
Content-Type text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding 7bit
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.15
Precedence list
Reply-To python-list@python.org
List-Id General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe <http://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive <http://mail.python.org/pipermail/python-list/>
List-Post <mailto:python-list@python.org>
List-Help <mailto:python-list-request@python.org?subject=help>
List-Subscribe <http://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups comp.lang.python
Message-ID <mailman.196.1357514503.2939.python-list@python.org> (permalink)
Lines 36
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1357514503 news.xs4all.nl 6977 [2001:888:2000:d::a6]:58819
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:36303

Show key headers only | View raw

On 2013-01-06 22:33, Hans Mulder wrote:
> On 6/01/13 20:44:08, Joseph L. Casale wrote:
>> I have a dataset that consists of a dict with text descriptions and values that are integers. If
>> required, I collect the values into a list and create a numpy array running it through a simple
>> routine: data[abs(data - mean(data)) < m * std(data)] where m is the number of std deviations
>> to include.
>>
>>
>> The problem is I loos track of which were removed so the original display of the dataset is
>> misleading when the processed average is returned as it includes the removed key/values.
>>
>>
>> Ayone know how I can maintain the relationship and when I exclude a value, remove it from
>> the dict?
>
> Assuming your data and the dictionary are keyed by a common set of keys:
>
> for key in descriptions:
>      if abs(data[key] - mean(data)) >= m * std(data):
>          del data[key]
>          del descriptions[key]
>
It's generally a bad idea to modify a collection over which you're
iterating. It's better to, say, make a list of what you're going to
delete and then iterate over that list to make the deletions:

deletions = []

for key in in descriptions:
     if abs(data[key] - mean(data)) >= m * std(data):
         deletions.append(key)

for key in deletions:
     del data[key]
     del descriptions[key]

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Numpy outlier removal "Joseph L. Casale" <jcasale@activenetwerx.com> - 2013-01-06 19:44 +0000
  Re: Numpy outlier removal Hans Mulder <hansmu@xs4all.nl> - 2013-01-06 23:33 +0100
    RE: Numpy outlier removal "Joseph L. Casale" <jcasale@activenetwerx.com> - 2013-01-06 22:50 +0000
    Re: Numpy outlier removal MRAB <python@mrabarnett.plus.com> - 2013-01-06 23:18 +0000
  Re: Numpy outlier removal Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-07 01:46 +0000
    Re: Numpy outlier removal "Paul Simon" <psimon@sonic.net> - 2013-01-06 18:21 -0800
    Re: Numpy outlier removal Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-01-07 02:29 +0000
      Re: Numpy outlier removal Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-07 05:11 +0000
        Re: Numpy outlier removal Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-01-07 15:20 +0000
          [Offtopic] Line fitting [was Re: Numpy outlier removal] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-07 17:58 +0000
            Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Chris Angelico <rosuav@gmail.com> - 2013-01-08 06:43 +1100
              Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-08 02:06 +0000
                Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Chris Angelico <rosuav@gmail.com> - 2013-01-08 17:35 +1100
                Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Robert Kern <robert.kern@gmail.com> - 2013-01-08 15:55 +0000
                Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Chris Angelico <rosuav@gmail.com> - 2013-01-09 07:14 +1100
                Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-09 07:50 +0000
                Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Robert Kern <robert.kern@gmail.com> - 2013-01-08 22:59 +0000
            Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-01-07 22:32 +0000
              Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-08 01:23 +0000
                Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Terry Reedy <tjreedy@udel.edu> - 2013-01-08 04:07 -0500
                Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Maarten <maarten.sneep@knmi.nl> - 2013-01-08 08:47 -0800
                Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Maarten <maarten.sneep@knmi.nl> - 2013-01-08 08:47 -0800
                Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-01-09 00:02 +0000
                Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-01-08 13:50 +0000
            Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Jason Friedman <jason@powerpull.net> - 2013-01-08 19:22 -0700
            Re: [Offtopic] Line fitting [was Re: Numpy outlier removal] Jason Friedman <jason@powerpull.net> - 2013-01-08 19:23 -0700
        Re: Numpy outlier removal Robert Kern <robert.kern@gmail.com> - 2013-01-07 15:35 +0000
    RE: Numpy outlier removal "Joseph L. Casale" <jcasale@activenetwerx.com> - 2013-01-07 02:12 +0000

csiph-web