Pittsburgh Bridges

Donated on 7/31/1990

Bridges database that has original and numeric-discretized datasets

Dataset Characteristics

Multivariate

Subject Area

Other

Associated Tasks

Classification

Feature Type

Categorical, Integer

# Instances

108

# Features

-

Dataset Information

Additional Information

There are two versions to the database: - V1 contains the original examples and - V2 contains descriptions after discretizing numeric properties. There are no ``classes'' in the domain. Rather this is a DESIGN domain where 5 properties (design description) need to be predicted based on 7 specification properties.

Has Missing Values?

Yes

Variables Table

Variable NameRoleTypeDemographicDescriptionUnitsMissing Values
no
no
no
no
no
no
no
no
no
no

0 to 10 of 13

Additional Variable Information

The type field state whether a property is continuous/integer (c) or nominal (n). For properties with c,n type, the range of continuous numbers is given first and the possible values of the nominal follow the semi-colon. Name / Type / Possible values / Comments 1. IDENTIF / -- / -- / identifier of the examples 2. RIVER / n / A, M, O / -- 3. LOCATION / n / 1 to 52 / -- 4. ERECTED / c,n / 1818-1986 ; CRAFTS, EMERGING, MATURE, MODERN / -- 5. PURPOSE / n / WALK, AQUEDUCT, RR, HIGHWAY / -- 6. LENGTH / c,n / 804-4558 ; SHORT, MEDIUM, LONG / -- 7. LANES / c,n / 1, 2, 4, 6 ; 1, 2, 4, 6 / -- 8. CLEAR-G / n / N, G / -- 9. T-OR-D / n / THROUGH, DECK / -- 10. MATERIAL / n / WOOD, IRON, STEEL / -- 11. SPAN / n / SHORT, MEDUIM, LONG / -- 12. REL-L / n / S, S-F, F / -- 13. TYPE / n / WOOD, SUSPEN, SIMPLE-T, ARCH, CANTILEV, CONT-T / --

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Creators

Yoram Reich

Steven Fenves

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