Home Online Manual
Top
Back: quotientLatticeBasis
Forward: rays
FastBack:
FastForward:
Up: gfan_lib
Top: Singular Manual
Contents: Table of Contents
Index: Index
About: About this document

D.13.2.35 randomPoint

Procedure from library gfan.lib (see gfan_lib).

Usage:
randomPoint(c); c cone
randomPoint(c,b); c cone, b int

Return:
bigintmat, a random point in the relative interior of c

Note:
returns a weighted sum over all its rays
if b is given and b>0, only chooses weights between 1 and b

Example:
 
LIB "gfan.lib";
intmat M[2][2]=
1,0,
0,1;
cone c=coneViaPoints(M);
bigintmat Q=randomPoint(c);
print(Q);
==> 1335380034,380636641
bigintmat P=randomPoint(c,5);
print(P);
==> 4,4