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7.5.5.0. sortIntvec
Procedure from library dmodapp.lib (see dmodapp_lib).
- Usage:
- sortIntvec(v); v an intvec
- Return:
- list of two intvecs
- Purpose:
- sorts an intvec
- Note:
- In the output list L, the first entry consists of the entries of v
satisfying L[1][i] >= L[1][i+1]. The second entry is a permutation
such that v[L[2]] = L[1].
Unlike in the procedure sort, zeros are not dismissed.
Example:
| | LIB "dmodapp.lib";
ring r = 0,x,dp;
intvec v = -1,0,1,-2,0,2;
list L = sortIntvec(v); L;
==> [1]:
==> 2,1,0,0,-1,-2
==> [2]:
==> 6,3,2,5,1,4
v[L[2]];
==> 2 1 0 0 -1 -2
v = -3,0;
sortIntvec(v);
==> [1]:
==> 0,-3
==> [2]:
==> 2,1
v = 0,-3;
sortIntvec(v);
==> [1]:
==> 0,-3
==> [2]:
==> 1,2
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See also:
sort.
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