chgcoef
If the coefficient does not already exist, a new coefficient will be added to the matrix. If many coefficients are being added to a row of the matrix, it may be more efficient to delete the old row of the matrix and add a new row.
chgcoef(prob, row, col, coef)
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prob
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The current problem.
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row
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Row index for the coefficient.
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col
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Column index for the coefficient.
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coef
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New value for the coefficient.
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