marks {bnlearn} | R Documentation |
Examination marks of 88 students on five different topics, from Mardia (1979).
data(marks)
The marks
data set contains the following variables,
one for each topic in the examination:
MECH
(mechanics)
VECT
(vectors)
ALG
(algebra)
ANL
(analysis)
STAT
(statistics)
All are measured on the same scale (0-100).
Edwards DI (2000). Introduction to Graphical Modelling. Springer, 2nd edition.
Mardia KV, Kent JT, Bibby JM (1979). Multivariate Analysis. Academic Press.
Whittaker J (1990). Graphical Models in Applied Multivariate Statistics. Wiley.
# This is the undirected graphical model from Edwards (2000). data(marks) ug = empty.graph(names(marks)) arcs(ug, ignore.cycles = TRUE) = matrix( c("MECH", "VECT", "MECH", "ALG", "VECT", "MECH", "VECT", "ALG", "ALG", "MECH", "ALG", "VECT", "ALG", "ANL", "ALG", "STAT", "ANL", "ALG", "ANL", "STAT", "STAT", "ALG", "STAT", "ANL"), ncol = 2, byrow = TRUE, dimnames = list(c(), c("from", "to")))