int[][] fix() {
        int[][] m = new int[nRows][mCols];
        for (int i = 0; i < nRows; i++)
            System.arraycopy(data, (i * mCols), m[i], 0, mCols);
        return m;
    }
int [ ] [ ] fix ( ) { int [ ] [ ] m = new int [ nRows ] [ mCols ] ; for ( int i = 0 ; i < nRows ; i ++ ) System . arraycopy ( data , ( i * mCols ) , m [ i ] , 0 , mCols ) ; return m ; }
Create a fixed-size 2D array of the matrix (useful for debug).

@return a fixed version of the matrix