1. Reading the data
## [1] "mpg" "cyl" "disp" "hp" "drat" "wt" "qsec" "vs" "am" "gear"
## [11] "carb"
2. Contingency Table – 2-way relationships
2.1 table()
## gear
## cyl 3 4 5
## 4 1 8 2
## 6 2 4 1
## 8 12 0 2
2.2 xtabs()
## gear
## cyl 3 4 5
## 4 1 8 2
## 6 2 4 1
## 8 12 0 2
2.3 ftable()
## gear 3 4 5
## cyl
## 4 1 8 2
## 6 2 4 1
## 8 12 0 2
3. Contingency Table – 3-way relationships
3.1 3-way table()
## , , am = 0
##
## gear
## cyl 3 4 5
## 4 1 2 0
## 6 2 2 0
## 8 12 0 0
##
## , , am = 1
##
## gear
## cyl 3 4 5
## 4 0 6 2
## 6 0 2 1
## 8 0 0 2
3-way table() contd.
## , , gear = 3
##
## am
## cyl 0 1
## 4 1 0
## 6 2 0
## 8 12 0
##
## , , gear = 4
##
## am
## cyl 0 1
## 4 2 6
## 6 2 2
## 8 0 0
##
## , , gear = 5
##
## am
## cyl 0 1
## 4 0 2
## 6 0 1
## 8 0 2
3.2 3-way xtabs()
## , , am = 0
##
## gear
## cyl 3 4 5
## 4 1 2 0
## 6 2 2 0
## 8 12 0 0
##
## , , am = 1
##
## gear
## cyl 3 4 5
## 4 0 6 2
## 6 0 2 1
## 8 0 0 2
3-way xtabs() contd.
## , , gear = 3
##
## cyl
## am 4 6 8
## 0 1 2 12
## 1 0 0 0
##
## , , gear = 4
##
## cyl
## am 4 6 8
## 0 2 2 0
## 1 6 2 0
##
## , , gear = 5
##
## cyl
## am 4 6 8
## 0 0 0 0
## 1 2 1 2
3.3 3-way ftable()
Example 1
## cyl 4 6 8
## gear 3 4 5 3 4 5 3 4 5
## am
## 0 1 2 0 2 2 0 12 0 0
## 1 0 6 2 0 2 1 0 0 2
Example 2
## gear 3 4 5
## cyl 4 6 8 4 6 8 4 6 8
## am
## 0 1 2 12 2 2 0 0 0 0
## 1 0 0 0 6 2 0 2 1 2
Example 3
## am 0 1
## gear cyl
## 3 4 1 0
## 6 2 0
## 8 12 0
## 4 4 2 6
## 6 2 2
## 8 0 0
## 5 4 0 2
## 6 0 1
## 8 0 2
Example 4
## am 0 1
## gear 3 4 5 3 4 5
## cyl
## 4 1 2 0 0 6 2
## 6 2 2 0 0 2 1
## 8 12 0 0 0 0 2
4. Contingency Table – 4-way relationships
Example 1
## am 0 1
## cyl 4 6 8 4 6 8
## gear 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5
## vs
## 0 0 0 0 0 0 0 12 0 0 0 0 1 0 2 1 0 0 2
## 1 1 2 0 2 2 0 0 0 0 0 6 1 0 0 0 0 0 0
Example 2
## am 0 1
## cyl 4 6 8 4 6 8
## gear vs
## 3 0 0 0 12 0 0 0
## 1 1 2 0 0 0 0
## 4 0 0 0 0 0 2 0
## 1 2 2 0 6 0 0
## 5 0 0 0 0 1 1 2
## 1 0 0 0 1 0 0
Example 3
## am 0 1
## cyl gear vs
## 4 3 0 0 0
## 1 1 0
## 4 0 0 0
## 1 2 6
## 5 0 0 1
## 1 0 1
## 6 3 0 0 0
## 1 2 0
## 4 0 0 2
## 1 2 0
## 5 0 0 1
## 1 0 0
## 8 3 0 12 0
## 1 0 0
## 4 0 0 0
## 1 0 0
## 5 0 0 2
## 1 0 0