Initializing help system before first use

# problem.delVariable

Purpose
Delete one or more variables from the problem.
Synopsis
`problem.delVariable(variables)`
Example

    N = 20
    p = xpress.problem()
    x = [p.addVariable() for i in range(N)]
    p.addConstraint(x[i] >= x[i+1] for i in range(N-1))

    # deletes x[2], x[3], i.e., third and fourth variable
    p.delVariable(x[2:4])

Further information
The argument can be single variables or a list, tuple or NumPy array of variables. Instead of variable objects, indices can also be used (from 0 to COLS-1). The index of a variable can be obtained with problem.getIndex.
Parent Topic Xpress problem object methods

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