gams:interpret_the_column_listing

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- | ====== How do I interpret the Column Listing? ====== | ||

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- | Q: //I get in my lst file:// | ||

- | <code> | ||

- | X(1,1) (.LO, .L, .UP = 0, 0.0033, +INF) | ||

- | 1 equation_X(1,1) | ||

- | (-147.9179) Calc_Y(1,1) | ||

- | </code> | ||

- | //The Variable X is used in calc_y. What does each value correspond to ?// | ||

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- | Submitted by Arne Drud: The line: ''X(1,1) (.LO, .L, .UP = 0, 0.0033, +INF)'' tells you which variable you are looking at and what its bounds and current value are. | ||

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- | The next line:''1 equation_X(1,1)'' tells you that the variable above appear in equation ''euation_X(1,1)'' | ||

- | and the the coefficient is 1, and that the relationship is linear. If the relationship is nonlinear there will be a parenthesis around the coefficient as shown next. | ||

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- | The third line: ''(-147.9179) Calc_Y(1,1)'' tells you that the same variable appear in equation ''Calc_Y(1,1)'', | ||

- | that the derivative in the current point (X(1,1) = 0.0033 from above is -147.9179, and the parenthesis says that the derivative is nonlinear so it could be different in another point. | ||

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- | Check also Section 10.5.2 of the User's Guide. |

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