Use the text box to specify the effects by which to adjust the
principal components
before modeling their sources of variability and to specify known sources of variability that are not to be included in the output pie chart.
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If you specify more than one effect, then you must separate the effects with
spaces
. For example, assuming
A
and
B
are listed as
Class Variables
, typing
A B
in the text field specifies
variables
A
and
B
as main fixed effects.
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To specify interactions between effect, type an
asterisk
(
*
) between the effects. For example, assuming
A
and
B
are listed as
Class Variables
, typing
A B A*B
specifies variables
A
and
B
, and the interaction between
A
and
B
, as effects.
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A
vertical bar
(
|
) can be used to create
main effects
and interactions. For example, typing
A|B
is the same as typing
A B A*B
.
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