sum+=array[pos+i]['rank'];var endPos=pos+i+1;for(pos;pos<endPos;pos++){array[pos]['rank']=sum/(i+1);}
pos=endPos;}
return array;},rank:function(x,y){var nx=x.length,ny=y.length,combined=[],ranked;while(nx--){combined.push({set:'x',val:x[nx]});}
while(ny--){combined.push({set:'y',val:y[ny]});}