User Manual User Manual
When working in the Constraints page, the user may edit the constraints (other than bounds and assignment exampes) that the weights and cutting level should respect.
The user may change the size of the grid cells and the size of the font by using the Height, Width and Font size buttons. The size of the area reserved for the inputs may be enlarged by dragging the line that divides the window in two parts. If the size of the left area of the window becomes smaller than the grid then scrollbars will appear. There may be cells smaller than its contents. In this case the contents appear truncated, but the users may see them entirely if they rest the mouse (without clicking) over one of such cells.
The constraints may be directly input in the corresponding cells. The first "normalization" equality (yellow color) is fixed. You may navigate between the remaining cells using your mouse or the keyboard arrow keys.
Zero-valued coefficients may be left blank (indeed, to improve readability, IRIS hides zero values that are not in the column RHS). The right hand sides cannot be negative, but the remaining coefficients can. To enter the type of inequality simply type "<", "=" or ">". The user may change the number of constraints, either creating new ones or deleting some of them. The constraints menu and the corresponding pop-up menu offer the commands to perform this. The option of deleting asks the user which constraint is to be deleted, and the constraints identification labels change accordingly after the deletion.
In the above example, the constraints ad1 to ad6 force k2 to have a value which is not less than any of the other weights: ad1 represents k2>=k1; ad2 represents k2>=k3; and so on.