Galaxy: Radial Velocity of Galaxy NGC7531

In OTE: Optimal Trees Ensembles for Regression, Classification and Class Membership Probability Estimation

Description

This data set is a record of radial velocity of a spiral galaxy that is measured at 323 points in its covered area of the sky. The positions of the measurements, that are in the range of seven slot crossing at the origin, are denoted by 4 variables.

Usage

data(Galaxy)

Format

A data frame with 324 observations recorded on the following 5 variables.

east.west

It is the east-west coordinate where east is taken as negative, west is taken as positive and origin, (0,0), is close to the center of galaxy.

north.south

It is the north-south coordinate where south is taken as negative, north is taken as positive and origin, (0,0), is near the center of galaxy.

angle

It is the degrees of anti rotation (clockwise) from the slot horizon where the observation lies.

radial.position

It is the signed distance from the center, (0,0), which is signed as negative if the east-west coordinate is negative.

velocity

This is the response variable denoting the radial velocity(km/sec) of the galaxy.

Source

Buta, R. (1987), “The Structure and Dynamics of Ringed Galaxies, III: Surface Photometry and Kinematics of the Ringed Nonbarred Spiral NGC7531” The Astrophysical J. Supplement Ser. 64. 1–37.

Examples

data(Galaxy)
str(Galaxy)

Example output

'data.frame':	323 obs. of  5 variables:
 $ east.west      : num  8.46 7.96 7.47 6.97 6.47 ...
 $ north.south    : num  -38.2 -35.9 -33.7 -31.4 -29.2 ...
 $ angle          : num  102 102 102 102 102 ...
 $ radial.position: num  39.1 36.8 34.5 32.2 29.9 ...
 $ velocity       : int  1769 1749 1749 1758 1750 1745 1750 1753 1734 1710 ...

OTE documentation built on April 20, 2020, 5:05 p.m.