Bond {SASmixed} | R Documentation |
The Bond
data frame has 21 rows and 3 columns of data on the
strength required to break metal bonds according to the metal and
the ingot.
This data frame contains the following columns:
c
, i
and n
indicating the metal involved (copper, iron or nickel).
Littel, R. C., Milliken, G. A., Stroup, W. W., and Wolfinger, R. D. (1996), SAS System for Mixed Models, SAS Institute (Data Set 1.2.4).
Mendenhall, M., Wackerly, D. D. and Schaeffer, R. L. (1990), Mathematical Statistics, Wadsworth (Exercise 13.36).
library(SASmixed) data(Bond) options( contrasts = c(unordered = "contr.SAS", ordered = "contr.poly")) formula(Bond) # check the formula fm1Bond <- lme( pressure ~ Metal, data = Bond, random = ~ 1 | Ingot) summary( fm1Bond ) # compare with output 1.1 on p. 6 VarCorr( fm1Bond ) # variance component estimates anova( fm1Bond )