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problem.pivot

Purpose
Performs a simplex pivot by bringing variable enter into the basis and removing leave.
Topic areas
Linear Algebra, Simplex
Synopsis
problem.pivot(enter, leave)
Arguments
enter 
Index of row or column to enter basis.
leave 
Index of row or column to leave basis.
Related controls
Double
PIVOTTOL 
Pivot tolerance.
RELPIVOTTOL 
Relative pivot tolerance.

Further information
1. Row indices are in the range 0 to ROWS- 1, whilst columns are in the range ROWS+ SPAREROWS to ROWS+ SPAREROWS+ COLS- 1.
2. Arguments enter, leave may contain xpress.var or xpress.constraint objects instead of indices.
Related topics
problem.getpivotorder, problem.getpivots.

Parent Topic Methods of the class problem

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