ad.df: Advertising data
In R330: An R package for Stats 330

Description Usage Format Details Examples

A data set which looks at the relationship between the sales and the expenditure on sales over 36 months

1	data(ad.df)

A data frame with 35 observations on the following 3 variables:

sales: monthly sales
spend: amount spent on advertising this month
prev.spend: amount spent on advertising in the previous month

We lose one observation when prev.spend was created

1 2	data(ad.df) advert.lm<-lm(sales~spend+prev.spend,data=ad.df)

Loading required package: s20x
Loading required package: leaps
Loading required package: rgl
Loading required package: lattice
Warning messages:
1: In rgl.init(initValue, onlyNULL) : RGL: unable to open X11 display
2: 'rgl_init' failed, running with rgl.useNULL = TRUE 
3: .onUnload failed in unloadNamespace() for 'rgl', details:
  call: fun(...)
  error: object 'rgl_quit' not found