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arff slurped Weka

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# Instances: 12960 / # Attributes: 9
HDF5 (5.0 MB) XML CSV ARFF LibSVM Matlab Octave

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Original Data Format

arff

Name

nursery

Version mldata

0

Comment

1. Title: Nursery Database

2. Sources: (a) Creator: Vladislav Rajkovic et al. (13 experts) (b) Donors: Marko Bohanec (marko.bohanec@ijs.si) Blaz Zupan (blaz.zupan@ijs.si) (c) Date: June, 1997

3. Past Usage:

The hierarchical decision model, from which this dataset is derived, was first presented in

M. Olave, V. Rajkovic, M. Bohanec: An application for admission in public school systems. In (I. Th. M. Snellen and W. B. H. J. van de Donk and J.-P. Baquiast, editors) Expert Systems in Public Administration, pages 145-160. Elsevier Science Publishers (North Holland)}, 1989.

Within machine-learning, this dataset was used for the evaluation of HINT (Hierarchy INduction Tool), which was proved to be able to completely reconstruct the original hierarchical model. This, together with a comparison with C4.5, is presented in

B. Zupan, M. Bohanec, I. Bratko, J. Demsar: Machine learning by function decomposition. ICML-97, Nashville, TN. 1997 (to appear)

1. Relevant Information Paragraph:

Nursery Database was derived from a hierarchical decision model originally developed to rank applications for nursery schools. It was used during several years in 1980's when there was excessive enrollment to these schools in Ljubljana, Slovenia, and the rejected applications frequently needed an objective explanation. The final decision depended on three subproblems: occupation of parents and child's nursery, family structure and financial standing, and social and health picture of the family. The model was developed within expert system shell for decision making DEX (M. Bohanec, V. Rajkovic: Expert system for decision making. Sistemica 1(1), pp. 145-157, 1990.).

The hierarchical model ranks nursery-school applications according to the following concept structure:

NURSERY Evaluation of applications for nursery schools . EMPLOY Employment of parents and child's nursery . . parents Parents' occupation . . has_nurs Child's nursery . STRUCT_FINAN Family structure and financial standings . . STRUCTURE Family structure . . . form Form of the family . . . children Number of children . . housing Housing conditions . . finance Financial standing of the family . SOC_HEALTH Social and health picture of the family . . social Social conditions . . health Health conditions

Input attributes are printed in lowercase. Besides the target concept (NURSERY) the model includes four intermediate concepts: EMPLOY, STRUCT_FINAN, STRUCTURE, SOC_HEALTH. Every concept is in the original model related to its lower level descendants by a set of examples (for these examples sets see http://www-ai.ijs.si/BlazZupan/nursery.html).

The Nursery Database contains examples with the structural information removed, i.e., directly relates NURSERY to the eight input attributes: parents, has_nurs, form, children, housing, finance, social, health.

Because of known underlying concept structure, this database may be particularly useful for testing constructive induction and structure discovery methods.

1. Number of Instances: 12960 (instances completely cover the attribute space)

2. Number of Attributes: 8

3. Attribute Values:

parents usual, pretentious, great_pret has_nurs proper, less_proper, improper, critical, very_crit form complete, completed, incomplete, foster children 1, 2, 3, more housing convenient, less_conv, critical finance convenient, inconv social non-prob, slightly_prob, problematic health recommended, priority, not_recom

1. Missing Attribute Values: none

2. Class Distribution (number of instances per class)

class N N[%]

---

not_recom 4320 (33.333 %) recommend 2 ( 0.015 %) very_recom 328 ( 2.531 %) priority 4266 (32.917 %) spec_prior 4044 (31.204 %)

Information about the dataset CLASSTYPE: nominal CLASSINDEX: last

Names

parents,has_nurs,form,children,housing,finance,social,health,class,

Types

1. nominal:usual,pretentious,great_pret
2. nominal:proper,less_proper,improper,critical,very_crit
3. nominal:complete,completed,incomplete,foster
4. nominal:1,2,3,more
5. nominal:convenient,less_conv,critical
6. nominal:convenient,inconv
7. nominal:nonprob,slightly_prob,problematic
8. nominal:recommended,priority,not_recom
9. nominal:not_recom,recommend,very_recom,priority,spec_prior

Data (first 10 data points)

pare...	has_...	form	chil...	hous...	fina...	social	health	class
usual	proper	comp...	1	conv...	conv...	nonp...	reco...	reco...
usual	proper	comp...	1	conv...	conv...	nonp...	prio...	prio...
usual	proper	comp...	1	conv...	conv...	nonp...	not_...	not_...
usual	proper	comp...	1	conv...	conv...	slig...	reco...	reco...
usual	proper	comp...	1	conv...	conv...	slig...	prio...	prio...
usual	proper	comp...	1	conv...	conv...	slig...	not_...	not_...
usual	proper	comp...	1	conv...	conv...	prob...	reco...	prio...
usual	proper	comp...	1	conv...	conv...	prob...	prio...	prio...
usual	proper	comp...	1	conv...	conv...	prob...	not_...	not_...
usual	proper	comp...	1	conv...	inconv	nonp...	reco...	very...
...	...	...	...	...	...	...	...	...

Description

A gzip'ed tar containing UCI and UCI KDD datasets (uci-20070111.tar.gz, 17,952,832 Bytes)

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Data Source

http://www.ics.uci.edu/~mlearn/MLRepository.html http://kdd.ics.uci.edu/

Measurement Details

Usage Scenario

revision 1

by mldata on 2010-11-06 09:58

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