docs: public void set(int numRows, int numCols, boolean rowMajor, double ...data)
      {
          reshape(numRows,numCols);
          int length = numRows*numCols;
  
          if( length > this.data.length )
              throw new IllegalArgumentException("The length of this matrix's data array is too small.");
  
          if( rowMajor ) {
              System.arraycopy(data,0,this.data,0,length);
          } else {
              int index = 0;
              for( int i = 0; i < numRows; i++ ) {
                  for( int j = 0; j < numCols; j++ ) {
                      this.data[index++] = data[j*numRows+i];
                  }
              }
          }
      }