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StatsToDo : Factor Analysis - Principal Component Extraction Program

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Related link :
Factor Analysis Explanation Page

Program References
Principal Component Using Raw Data

Principal Component Using Matrix

Data Entry for using Raw Data
The data is a matrix of numbers with multiple columns
    - Each row a subject
    - Each column a variable
    - Each cell the value of that variable (col) for that subject(row)

Data Entry for using Matrix
The data is a symmetrical matrix (rows=columns)
    - The matrix can be a covariance or a correlation matrix
    - Each column and each row represent a variable
    - Each cell the matrix coefficient between variables