* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *                                                                       *
 * PCA_8_16:   Calculate PCA on BIL datasets.                            *
 *                                                                       *
 *         -   Input parameters (at command line) are:                   *
 *                 -        Dataset filename                             *
 *                 -        Rows                                         *
 *                 -        Columns                                      *
 *                 -        Bands                                        *
 *                 -        Header size                                  *
 *                 -        Null cell value [-1 = none]                  *
 *                 -        Number of components [-1 = max, 0 = none ]   *
 *                 -        PC dataset filename (LSB)                    *
 *         -   Output parameters (on output) for each band are:          *
 *                 -        Active cell count                            *
 *                 -        Minimum                                      *
 *                 -        Maximum                                      *
 *                 -        Average                                      *
 *                 -        Median                                       *
 *                 -        Entropy                                      *
 *                 -        Std. Deviation                               *
 *                 -        Variance-covariance matrix                   *
 *                 -        Correlation matrix                           *
 *                 -        Eigenvalues 				                 *
 *                 -        Eigenvectors 				                 *
 *         -   Works on 8-16 bit of signed integers                      *
 *                                                                       *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 *                                                                       *
 * PCA_8_16    by Christos Iossifides (c) January 2003-04 NaTUReS Lab.   *
 *                                                                       *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *