BIB {SASmixed} | R Documentation |
The BIB
data frame has 24 rows and 5 columns.
This data frame contains the following columns:
1
< 2
< 3
< 8
< 5
< 4
< 6
< 7
1
to 4
.
13
and
24
These appear to be constructed data.
Littel, R. C., Milliken, G. A., Stroup, W. W., and Wolfinger, R. D. (1996), SAS System for Mixed Models, SAS Institute (Data Set 5.4).
library(SASmixed) data(BIB) options( contrasts = c(unordered = "contr.SAS", ordered = "contr.poly")) coplot(y ~ x | Block, data = BIB, show = FALSE) fm1BIB <- lme(y ~ Treatment * x, data = BIB, random = ~ 1 | Block) summary(fm1BIB) # compare with Output 5.7, p. 188 VarCorr(fm1BIB) anova(fm1BIB) # strong evidence of different slopes fm2BIB <- lme(y ~ Treatment + x : Grp, data = BIB, random = ~ 1 | Block) summary(fm2BIB) # compare with Output 5.9, p. 193 VarCorr(fm2BIB) anova(fm2BIB)