Assigning Data to Roles
To run the Principal
Component Analysis task, you must select an input data source. To filter the input
data source, click 
.
.
You must assign a variable
to the Analysis variables role.
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Roles
|
Description
|
|---|---|
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Roles
|
|
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Analysis
variables
|
lists the variables
for the principal component analysis.
|
|
Additional Roles
|
|
|
Variables
to partial out
|
lists the variables
to analyze in a partial correlation or covariance matrix.
|
|
Frequency
count
|
lists a numeric variable whose
value represents the frequency of the observation. If you assign a
variable to this role, the task assumes that each observation represents n observations,
where n is the value of the frequency variable.
If n is not an integer, SAS truncates it. If n is
less than 1 or is missing, the observation is excluded from the analysis.
The sum of the frequency variable represents the total number of observations.
|
|
Weight
|
lists the numeric variable whose
value represents the weight for each observation in the input data
set. If the value for the weight is less than or equal to 0 or the
weight is a missing value, the observation is excluded from the analysis.
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|
Group analysis
by
|
enables you to obtain separate
analyses of observations for each unique group.
|
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