add modifyCoefficient

coin-or · Aug 13, 2024 · b043522 · b043522
1 parent 38e3568
commit b043522
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Showing 2 changed files with 22 additions and 1 deletion.
diff --git a/src/Cbc_C_Interface.cpp b/src/Cbc_C_Interface.cpp
@@ -3520,6 +3520,17 @@ Cbc_setInteger(Cbc_Model *model, int iColumn)
 
   model->solver_->setInteger(iColumn);
 }
+
+/** Change matrix coefficients */
+void CBC_LINKAGE
+Cbc_modifyCoefficient(Cbc_Model *model, int row, int column, double newValue )
+{
+  Cbc_flush(model);
+  VALIDATE_ROW_INDEX(row, model);
+  VALIDATE_COL_INDEX(column, model);
+
+  model->solver_->modifyCoefficient(row, column, newValue);
+}
 
 /** Adds a new column */
 void CBC_LINKAGE

diff --git a/src/Cbc_C_Interface.h b/src/Cbc_C_Interface.h
@@ -408,7 +408,17 @@ Cbc_setContinuous(Cbc_Model *model, int iColumn);
   **/
 CBCLIB_EXPORT void CBC_LINKAGE
 Cbc_setInteger(Cbc_Model *model, int iColumn);
-
+
+/** @brief Change matrix coefficients
+  *
+  * @param model problem object
+  * @param row row index
+  * @param column column index
+  * @param newValue new value of the coefficient
+  **/
+CBCLIB_EXPORT void CBC_LINKAGE
+Cbc_modifyCoefficient(Cbc_Model *model, int row, int column, double newValue);
+
 /** @brief Frees memory of model object 
   *
   * @param model problem object */