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Groups > comp.lang.python > #36303
| Date | 2013-01-06 23:18 +0000 |
|---|---|
| From | MRAB <python@mrabarnett.plus.com> |
| Subject | Re: Numpy outlier removal |
| References | <mailman.179.1357501521.2939.python-list@python.org> <50e9fbd5$0$6848$e4fe514c@news2.news.xs4all.nl> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.196.1357514503.2939.python-list@python.org> (permalink) |
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]
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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
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