coffee: Artifcial data set on Coffee Consumption, Heart Damage Index...

Description Usage Format References Examples

Description

Artifical data on 20 subjects to illustrate issues of causality with observational data

Usage

1

Format

A data frame with 20 observations on the following 5 variables.

Occupation

a factor with levels Grad_Student Professor Student

Coffee

Index of coffee consumption

Stress

Index of stress

Heart

Heart Index: higher indicates a less healthy heart

Stress2

Index of stress that is less reliable than 'Stress'

References

Monette, G. (1990), Geometry of Multiple Regression and Interactive 3-D Graphics, In Fox, J. & Long, S. (ed.), Modern Methods of Data Analysis, Sage Publications, 209-256.

Examples

1
2
data(coffee)
## maybe str(coffee) ; plot(coffee) ...

p3d documentation built on May 2, 2019, 5:25 p.m.