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D.3.1.28 headStand
Procedure from library matrix.lib (see matrix_lib).
- Usage:
- headStand(M); M matrix
- Return:
- matrix B such that B[i][j]=M[n-i+1,m-j+1], n=nrows(M), m=ncols(M)
Example:
| LIB "matrix.lib";
ring r=0,(A,B,C),dp;
matrix M[2][3]=
0,A, B,
A2, B2, C;
print(M);
==> 0, A, B,
==> A2,B2,C
print(headStand(M));
==> C,B2,A2,
==> B,A, 0
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