pub fn volcano() -> Result<DataFrame, PolarsError>Expand description
§Topographic Information on Auckland’s Maunga Whau Volcano
§Description:
Maunga Whau (Mt Eden) is one of about 50 volcanos in the Auckland volcanic field. This data set gives topographic information for Maunga Whau on a 10m by 10m grid.
§Usage:
volcano
§Format:
A matrix with 87 rows and 61 columns, rows corresponding to grid lines running east to west and columns to grid lines running south to north.
§Source:
Digitized from a topographic map by Ross Ihaka. These data should not be regarded as accurate.
§See Also:
‘filled.contour’ for a nice plot.
§Examples:
require(grDevices); require(graphics)
filled.contour(volcano, color.palette = terrain.colors, asp = 1)
title(main = "volcano data: filled contour map")