ElemStatLearn (version 2015.6.26.2)

galaxy: Galaxy Data

Description

Radial Velocity of Galaxy NGC7531

Usage

data(galaxy)

Format

A data frame with 323 observations on the following 5 variables.

east.west

the east-west coordinate. The origin, (0,0), is near the center of the galaxy, east is negative, west is positive.

north.south

the north-south coordinate. The origin, (0,0), is near the center of the galaxy, south is negative, north is positive.

angle

degrees of counter-clockwise rotation from the horizon- tal of the slot within which the observation lies.

radial.position

signed distance from origin; negative if east-west coordinate is negative.

velocity

radial velocity measured in km/sec.

Details

The galaxy data frame records the radial velocity of a spiral galaxy measured at 323 points in the area of sky which it covers. All the measurements lie within seven slots crossing at the origin. The positions of the meas- urements given by four variables (columns).

Examples

# NOT RUN {
str(galaxy) 
summary(galaxy)
# }