Longley's Regression Data
Usage
data(longley)
Format
A data.frame with 7 economical variables, observed yearly
from 1947 to 1962 (n=16).
GNP.deflator: | GNP implicit price deflator (1954=100) |
GNP : | Gross National Producr. |
Unemployed : | number of unemployed |
Armed.Forces: | number of .. in the armed forces |
Population : | `noninstitutionalized' population |
| >= 14 years of age. |
Year : | the year (time). |
Employed : | number of people employed. |
The regression lm(Employed ~ .) is known to be highly collinear.Source
J. W. Longley (1967).
An appraisal of least-squares programs from the point of view of the user.
Journal of the American Statistical Association 62, 819-841.Examples
# give the data set in the form it is used in S-plus:
data(longley)
longley.x <- data.matrix(longley[,1:6])
longley.y <- longley[,"Employed"]