The enter and add commands allow you to build a problem from the keyboard, but they do not allow you to change what you have built. You make changes with the change command.

The change command can be used for:

• Changing Constraint or Variable Names
• Changing Sense
• Changing Bounds and Removing Bounds
• Changing Coefficients
• Deleting entire constraints or variables

Start out by changing the name of the constraint that you added with the add command. In order to see a list of change options, type:

change

The elements that can be changed are displayed like this:

Change options: bounds change bounds on a variable coefficient change a coefficient delete delete some part of the problem name change a constraint or variable name objective change objective function value problem change problem type qpterm change a quadratic objective term rhs change a right-hand side or network supply/demand value sense change objective function or a constraint sense type change variable type Change to make: