gvessel: North Atlantic Water Temperature Data.

In LPCM: Local Principal Curve Methods

North Atlantic Water Temperature Data.

Description

These are observations taken over nine days in May 2000 by the German vessel Gauss in the North Atlantic.

Usage

data(gvessel)

Format

A data frame with 643 observations on the following 7 variables.

day2g

an integer for the day at which the measurement was taken.

salg

a numeric vector with measurements of salinity according to the PSS (Practical Salinity Scale).

tempg

a numeric vector with measurements of water temperature in degrees Celsius.

depthg

a numeric vector with the water depths (in meters) at which the measurements were taken.

oxyg

a numeric vector with measurements of oxygen content (mm per litre of water)

longg

longitude

latg

latitude

Source

Retrieved by B. Powell from the World Ocean Database.

References

Einbeck, J., Evers, L., and Powell, B. (2010): Data compression and regression through local principal curves and surfaces, International Journal of Neural Systems, 20, 177-192.

Examples

data(gvessel)
pairs(gvessel[,c(3,2,4,5)])
tcol <- (gvessel$tempg- min(gvessel$tempg))/(max(gvessel$tempg)- min(gvessel$tempg))
require(scatterplot3d)
scatterplot3d(gvessel[,2],gvessel[,4],gvessel[,5], color=rgb(tcol,0,1-tcol))

LPCM documentation built on Jan. 6, 2023, 5:22 p.m.