download_mammoth50k: Mammoth 50K

In jlmelville/snedata: SNE Simulation Dataset Functions

Mammoth 50K

Description

Downloads the 50,000 point 'Mammoth' dataset, a 3D point cloud of a mammoth skeleton.

Usage

download_mammoth50k()

Format

A data frame with 50,000 rows and 3 variables, Y, X, Z, containing the Y, X, and Z coordinates respectively. This labeling of axes preserves the ordering of the raw data, and makes the Z-coordinate the "height", i.e. the height of the mammoth varies with Z. Note that the ordering of the axes differs from that of download_mammoth10k. Use the X, Y, and Z labels rather than numerical indices for consistency between the two datasets.

For more information see https://pair-code.github.io/understanding-umap/.

Details

Downloads a dataframe containing the 50,000 3D coordinates of a mammoth skeleton, digitized by The Smithsonian Institute.

This dataset is from Understanding UMAP, based on work originally done by Max Noichl. 50,000 points were down-sampled from the raw data used by Max Noichl.

Value

Data frame containing the Mammoth coordinates.

Note

Requires the rjson package to be installed and loaded.

See Also

• Max Noichl's page: https://github.com/MNoichl/UMAP-examples-mammoth-.

• Understanding UMAP: https://pair-code.github.io/understanding-umap/.

• The Smithsonian page: https://3d.si.edu/object/3d/mammuthus-primigenius-blumbach:341c96cd-f967-4540-8ed1-d3fc56d31f12.

• download_mammoth10k to download a 10,000 point random sub-sample of this data.

Examples

## Not run: 
mammoth <- download_mammoth50k()
# The mammoth in profile, facing left
plot(mammoth$X, mammoth$Z)

## End(Not run)

jlmelville/snedata documentation built on Jan. 13, 2024, 2:06 a.m.