This function changes the sign of the elements in column of the component matrix.
invcmp(comp, nr, nc, chgcomp)
One of the three component matrices.
The row number of the component matrix.
The column number of the component matrix.
The pointers to the columns of the component matrix that are responsible for the value in the ordered core.
Rosaria Lombardo and Pieter M Kroonenberg.
Kroonenberg PM (1994) The TUCKALS line: a suite of programs for three-way data analysis. Computational Statistics and Data Analysis, 18, 73--96.