Counting Euler Angle Ranges

I have head rotation values that range from 0-360 degrees and I want to note when the head enters between 30 and 60 degrees. The issue I have is when the head enters this range my code detects every value within this range when I want it to only document it entering the range once then note when it has left the range again. How do I achieve this? This is the code I used but want to alter:

lowerboundUp=60; lowerboundLow=30;

index=lookDirection<lowerboundUp | lookDirection>lowerboundLow; lookDirection(index)=[];

Thank you for all your help.

Answer 1

[Roger Stafford]

Assuming your rotation values, ‘r’, are successively indexed by, say, ‘ix’, then use

   (r(ix-1)<30 | r(ix-1)>60) & r(ix)>=30 & r(ix)<=60

for an entry into the range and

   r(ix-1)>=30 & r(ix-1)<=60 & (r(ix)<30 | r(ix)>60)

for an exit.