1) SELECT
Certain options, such as factoring, may be applied only to selected “areas” or cells of the matrix - this option defines those areas.
2) FACTORING
These options include not only simple factoring of all (or part) of the matrix but also Furness factoring by row or column totals (both singly and doubly constrained). Factor definitions may be either interactive or read in from pre-prepared “control files”.
3) MATRIX MANIPULATION; E.G. USING FORTRAN EQUATIONS
This option allows for a very general matrix manipulation by defining, via equations based on FORTRAN syntax, the new matrix to be created. For example to average two matrices the user would type:
while more complex matrix operations are possible, for example:
transforms an input matrix into its corresponding negative exponential.