first version that reproduce binary classification demo

src/io/io.cpp

@@ -7,9 +7,9 @@
 
 namespace xgboost {
 namespace io {
-DataMatrix* LoadDataMatrix(const char *fname) {
+DataMatrix* LoadDataMatrix(const char *fname, bool silent, bool savebuffer) {
   DMatrixSimple *dmat = new DMatrixSimple();
-  dmat->CacheLoad(fname);
+  dmat->CacheLoad(fname, silent, savebuffer);
   return dmat;
 }
 }  // namespace io

src/io/io.h

@@ -17,9 +17,11 @@ typedef learner::DMatrix<FMatrixS> DataMatrix;
 /*!
  * \brief load DataMatrix from stream
  * \param fname file name to be loaded
+ * \param silent whether print message during loading
+ * \param savebuffer whether temporal buffer the file if the file is in text format
  * \return a loaded DMatrix
  */
-DataMatrix* LoadDataMatrix(const char *fname);
+DataMatrix* LoadDataMatrix(const char *fname, bool silent = false, bool savebuffer = true);
 /*!
  * \brief save DataMatrix into stream, 
  *  note: the saved dmatrix format may not be in exactly same as input