Add Cbc_modifyCoefficient to C interface.

coin-or · Jul 2, 2024 · 62509bd · 62509bd
1 parent 72fa111
commit 62509bd
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diff --git a/src/Cbc_C_Interface.cpp b/src/Cbc_C_Interface.cpp
@@ -3523,6 +3523,17 @@ 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
 Cbc_addCol(Cbc_Model *model, const char *name, double lb,

diff --git a/src/Cbc_C_Interface.h b/src/Cbc_C_Interface.h
@@ -409,6 +409,16 @@ 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 */