pub fn freeny() -> Result<DataFrame, PolarsError>Expand description
§Freeny’s Revenue Data
§Description:
Freeny’s data on quarterly revenue and explanatory variables.
§Usage:
freeny freeny.x freeny.y
§Format:
There are three ‘freeny’ data sets.
- ‘freeny.y’ is a time series with 39 observations on quarterly revenue from (1962,2Q) to (1971,4Q).
- ‘freeny.x’ is a matrix of explanatory variables. The columns are
- ‘freeny.y’ lagged 1 quarter, price index, income level, and market potential.
- Finally, ‘freeny’ is a data frame with variables ‘y’, ‘lag.quarterly.revenue’, ‘price.index’, ‘income.level’, and ‘market.potential’ obtained from the above two data objects.
§Source:
A. E. Freeny (1977) A Portable Linear Regression Package with Test Programs. Bell Laboratories memorandum.
§References:
Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.
§Examples:
require(stats); require(graphics)
summary(freeny)
pairs(freeny, main = "freeny data")
# gives warning: freeny$y has class "ts"
summary(fm1 <- lm(y ~ ., data = freeny))
opar <- par(mfrow = c(2, 2), oma = c(0, 0, 1.1, 0),
mar = c(4.1, 4.1, 2.1, 1.1))
plot(fm1)
par(opar)