shells: Microfossil shell data

Description Usage Format Source References Examples

Description

Microfossil shell data. Triangles from 21 individuals. Lohmann (1983) published 21 mean outlines of the microfossil which were based on random samples of organisms taken at different latitudes in the South Indian Ocean.

Usage

1

Format

shells$uv Scaled shape coordinates (Bookstein shape co-ordinates with base (0,0) and (1,0). shells$size Centroid size

Source

Bookstein, F. L. (1986). Size and shape spaces for landmark data in two dimensions (with discussion). Statistical Science, 1:181-242.

Lohmann, G. P. (1983). Eigenshape analysis of microfossils: a general morphometric procedure for describing changes in shape. Mathematical Geology, 15:659-672.

References

The data have been extracted from Fig. 7 of Bookstein (1986).

Examples

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2

Example output

Attaching package: 'shapes'

The following object is masked from 'package:stats':

    sigma

Warning messages:
1: In rgl.init(initValue, onlyNULL) : RGL: unable to open X11 display
2: 'rgl_init' failed, running with rgl.useNULL = TRUE 
3: .onUnload failed in unloadNamespace() for 'rgl', details:
  call: fun(...)
  error: object 'rgl_quit' not found 

shapes documentation built on Sept. 22, 2017, 5:03 p.m.

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