jigsaw.puzzle.measures: Hartigan (1975) Jigsaw Puzzle Measurements
Description Usage Format Details Source References Examples
Description
A table of measurements for each piece in a jigsaw puzzle. This is Table 3.1 in Chapter 3 of Hartigan (1975) on page 76.
Usage
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Format
A data frame with 20 observations on the following 13 variables.
piecea numeric vector for the number of the piece.
L1a numeric vector for length of the line between the corners.
I1a numeric vector for the maximum deviation of the line into the piece
O1a numeric vector for the maximum deviation of the line out of the piece.
L2a numeric vector for the length of the line between the corners
I2a numeric vector for the maximum deviation of the line into the piece
O2a numeric vector for the maximum deviation of the line out of the piece.
L3a numeric vector for the length of the line between the corners.
I3a numeric vector for the maximum deviation of the line into the piece
O3a numeric vector for the maximum deviation of the line out of the piece.
L4a numeric vector for the length of the line between the corners.
I4a numeric vector for the maximum deviation of the line into the piece
O4a numeric vector for the maximum deviation of the line out of the piece.
Details
A jigsaw puzzle comprises 20 pieces, arranged in a regular array and numbered as follows:
| 1 | 2 | 3 | 4 |
| 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 |
| 13 | 14 | 15 | 16 |
| 17 | 18 | 19 | 20 |
Each piece is roughly rectangular. The corners of the piece are called its vertices, and the sides are called its edges. The four edges of each piece are numbered consecutively, starting from the top and moving clockwise.
For each piece, three measurements were made on each of the four edges, estimating the length of the side, and the amount by which the edge cuts into or juts out of the line joining the two vertices on that side. The measurements are in hundredths of an inch.
Source
Hartigan, J. A. (1975). Clustering Algorithms, John Wiley, New York.
SPAETH2 Cluster Analysis Datasets http://people.sc.fsu.edu/~jburkardt/datasets/spaeth2/spaeth2.html
References
Hartigan, J. A. (1975). Clustering Algorithms, John Wiley, New York.
Examples
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