[Mrql Wiki] Update of "points.mrql" by LeonidasFegaras

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The "points.mrql" page has been changed by LeonidasFegaras:
http://wiki.apache.org/mrql/points.mrql

New page:
{{{
// generate random points in the 4 squares: [2..4,6..8]*[2..4,6..8]
// used in kmeans.mrql

function randomV ( v: double ) : double {
  let x = random(100000)/10000.0
  in if ((x >= v and x <= v*2.0)
         or (x >= v*3.0 and x <= v*4.0))
     then x
     else randomV(v)
};

store "points.bin"
 from select < X: randomV(2.0), Y: randomV(2.0) >
        from i in 1...(toLong(args[0]));
}}}