download_mammoth10k: Mammoth 10K

In jlmelville/snedata: SNE Simulation Dataset Functions

Mammoth 10K

Description

Downloads the 10,000 point 'Mammoth' dataset, a 3D point cloud of a mammoth skeleton.

Usage

download_mammoth10k()

Format

A data frame with 10,000 rows and 3 variables, X, Z, Y, containing the X, Z, and Y coordinates respectively. This labeling of axes preserves the ordering of the 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_mammoth50k. 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 10,000 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. It consists of 10,000 points randomly sampled from the 50,000 point data set.

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_mammoth50k to download the original 50,000 points, from which this dataset was randomly sampled.

Examples

## Not run: 
mammoth <- download_mammoth10k()
# 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.