docs: public static DMatrixRMaj diagR(int numRows , int numCols , double ...diagEl )
      {
          DMatrixRMaj ret = new DMatrixRMaj(numRows,numCols);
  
          int o = Math.min(numRows,numCols);
  
          for( int i = 0; i < o; i++ ) {
              ret.set(i, i, diagEl[i]);
          }
  
          return ret;
      }