Initializing help system before first use

# problem.delQMatrix

Purpose
Deletes the quadratic part of a row or of the objective function.
Topic areas
Problem Creation, Quadratic, Optimizer
Synopsis
`problem.delQMatrix(row)`
Argument

row | Index of row from which the quadratic part is to be deleted.

Further information
1. If a row index of -1 is used, the function deletes the quadratic coefficients from the objective function.
2. This function cannot be called while the current problem is being solved or when it is in an interrupted state. Use problem.postSolve to restore the problem to a non-solving state.
3. Argument row may contain xpress.constraint objects instead of indices.
Related topics
problem.addRows, problem.delCols, problem.delRows.
Parent Topic Methods of the class problem

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