The Principal component analysis (PCA) node in SciCraft has the
following input arguments:
: The input data matrix. Each row is an object and each
column contains the different variables (features)
the maximum number of principal components (PC) which
will be extracted
The output arguments from the node are:
: Matrix of PCA scores (the coordinates in the new
coordinate system defined by the principal components)
: Matrix of loadings (transposed) which describe the
influence of every varible in the definition of each PC.
: The residual matrix. This is the data matrix after
subtracting the
PC from
: The percentage explained variance for each PC.
Bjørn Alsberg
2004-10-22