var ch1 = Scope.Channel1
var ch2 = Scope.Channel2
var data1 = ch1.visibledata
var data2 = ch2.visibledata
var cnt = data1.length
var avg1 = ch1.measure("Average")
var avg2 = ch2.measure("Average")
var sum1 = 0
var sum2 = 0
var sum12 = 0
for(var i = 0; i < cnt; i++){
   sum1 += (data1[i]-avg1)*(data1[i]-avg1)
   sum2 += (data2[i]-avg2)*(data2[i]-avg2)
   sum12 +=(data1[i]-avg1)*(data2[i]-avg2)
}
acos(sum12/sqrt(sum1*sum2))*180/PI