face.iGAP: Face Dataset (iGAP Format)

In dataSDA: Datasets and Basic Statistics for Symbolic Data Analysis

Face Dataset (iGAP Format)

Description

Interval-valued facial measurement data for 27 face images (9 individuals x 3 replications) in iGAP format (comma-separated interval strings). Contains 6 distance measurements between facial landmarks.

Usage

data(face.iGAP)

Format

A data frame with 27 observations and 6 character columns in iGAP format (comma-separated "min,max" strings):

• AD: Distance AD (facial landmark pair).

• BC: Distance BC (facial landmark pair).

• AH: Distance AH (facial landmark pair).

• DH: Distance DH (facial landmark pair).

• EH: Distance EH (facial landmark pair).

• GH: Distance GH (facial landmark pair).

Row names encode individual and replication (e.g., FRA1, FRA2, FRA3).

Metadata

Sample size (n)	27
Variables (p)	6
Subject area	Biometrics
Symbolic format	Interval (iGAP)
Analytical tasks	Classification, Visualization

References

Leroy, B., Chouakria, A., Herlin, I., and Diday, E. (1996). Approche geometrique et classification pour la reconnaissance de visage. In Reconnaissance des Formes et Intelligence Artificielle (RFIA), 548–557.

Examples

data(face.iGAP)

dataSDA documentation built on June 12, 2026, 9:06 a.m.