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Last modified: January 26, 2018
Stacked and Unstacked Data
--------------------------
Stacked and unstacked data are ways of arranging data.
If the data is stacked, the values for all groups are
in a single column. A corresponding column of labels
identifies the group (grouping column)
Stacked:
Gender Hair Color Eye Color
------ ---------- ---------
M Black Green
F Brown Green
M Blonde Blue
M Blonde Hazel
M Brown Blue
F Brown Hazel
F Black Blue
F Black Hazel
If data are unstacked, each column contains observations
from one group. There is no grouping column.
Unstacked:
Gender
M F Total
- - -----
Hazel 1 2 3
Blue 2 1 3
Green 1 1 2
Total 4 4 8
This is the form used for crosstabs.