OK

R-package/src/xgboost_R.cpp

@@ -76,17 +76,6 @@ extern "C" {
     _WrapperEnd();
     return ret;
   }
-  SEXP XGDMatrixCreateCache_R(SEXP fname, SEXP cache_file, SEXP silent) {
-    _WrapperBegin();
-    void *handle = XGDMatrixCreateCache(CHAR(asChar(fname)),
-                                        CHAR(asChar(cache_file)),
-                                        asInteger(silent));
-    SEXP ret = PROTECT(R_MakeExternalPtr(handle, R_NilValue, R_NilValue));
-    R_RegisterCFinalizerEx(ret, _DMatrixFinalizer, TRUE);
-    UNPROTECT(1);
-    _WrapperEnd();
-    return ret;
-  }
   SEXP XGDMatrixCreateFromMat_R(SEXP mat, 
                                 SEXP missing) {
     _WrapperBegin();

R-package/src/xgboost_R.h

@@ -24,15 +24,6 @@ extern "C" {
    * \return a loaded data matrix
    */
   SEXP XGDMatrixCreateFromFile_R(SEXP fname, SEXP silent);
-  /*!
-   * \brief load a cached DMatrix, this is backed by several cache_files
-   *  and usually cost less memory
-   * \param fname the name of the file, can be a cached buffer or text
-   * \param cache_file the name of cached file
-   * \param silent whether print messages during loading
-   * \return a loaded data matrix
-   */
-  SEXP XGDMatrixCreateCache_R(SEXP fname, SEXP cache_file, SEXP silent);
   /*!
    * \brief create matrix content from dense matrix
    * This assumes the matrix is stored in column major format