Hey guys, I was wondering if anyone knows how to delete rand points/prims with `rand()` in blast SOP. 
  
For some reason I couldn't get it to work: 
  
`rand(@ptnum)`>0.5 
  
so I did this.. 
  
@id>`fit(0.5,0,1,1,npoints(opinputpath(".",0)))` 
  
but I guess there are chases where I dont/cant use id. 
  
Thanks!