int negativeVarColumn = columnLabels.indexOf(NEGATIVE_VAR_COLUMN_LABEL); Integer negativeVarBasicRow = negativeVarColumn > 0 ? getBasicRow(negativeVarColumn) : null; double mostNegative = negativeVarBasicRow == null ? 0 : getEntry(negativeVarBasicRow, getRhsOffset()); basicRows.add(basicRow); coefficients[i] = (basicRow == null ? 0 : getEntry(basicRow, getRhsOffset())) - (restrictToNonNegative ? 0 : mostNegative);
int negativeVarColumn = columnLabels.indexOf(NEGATIVE_VAR_COLUMN_LABEL); Integer negativeVarBasicRow = negativeVarColumn > 0 ? getBasicRow(negativeVarColumn) : null; double mostNegative = negativeVarBasicRow == null ? 0 : getEntry(negativeVarBasicRow, getRhsOffset()); basicRows.add(basicRow); coefficients[i] = (basicRow == null ? 0 : getEntry(basicRow, getRhsOffset())) - (restrictToNonNegative ? 0 : mostNegative);
/** * Solves Phase 1 of the Simplex method. * @param tableau simple tableau for the problem * @exception OptimizationException if the maximal number of iterations is * exceeded, or if the problem is found not to have a bounded solution, or * if there is no feasible solution */ protected void solvePhase1(final SimplexTableau tableau) throws OptimizationException { // make sure we're in Phase 1 if (tableau.getNumArtificialVariables() == 0) { return; } while (!tableau.isOptimal()) { doIteration(tableau); } // if W is not zero then we have no feasible solution if (!MathUtils.equals(tableau.getEntry(0, tableau.getRhsOffset()), 0, epsilon)) { throw new NoFeasibleSolutionException(); } }
/** * Solves Phase 1 of the Simplex method. * @param tableau simple tableau for the problem * @exception OptimizationException if the maximal number of iterations is * exceeded, or if the problem is found not to have a bounded solution, or * if there is no feasible solution */ protected void solvePhase1(final SimplexTableau tableau) throws OptimizationException { // make sure we're in Phase 1 if (tableau.getNumArtificialVariables() == 0) { return; } while (!tableau.isOptimal()) { doIteration(tableau); } // if W is not zero then we have no feasible solution if (!MathUtils.equals(tableau.getEntry(0, tableau.getRhsOffset()), 0, epsilon)) { throw new NoFeasibleSolutionException(); } }