list - r How do I allow assignment from commands below? -

I have a list hx [[i]] Slowly displays this list but the list refers to the "real-world" list. For this reason, the list should be a fixed order (described by the real-world list) in the script for readability. In addition, the list element relies with the exception of the other list elements ( hx [[1]] ) and the dependency is such that some elements depend on the elements given below in the script. For example,

  HX [[2]] & lt; - HX [[3]] + 4 HX [[3]] & lt; - HX [[1]] HX [[4]] & Lt; - hx [[2]] - 2   
 Edit: NB will have the highest one  hx [[ii]]  in each assignment operation, on the right side  hx [[i]]  itself may depend on another  HX [[J]] , but the following kind of thing is never  
  HX [K]]  - Hx [[I]] + HX [[J]]   
 Now, what I'm doing is stupid but seems to be effective (I'm wondering if there is a better way ) If I assign all the elements in the  hx [[1]]  then I run the code typed  150x  so that reverse dependency is definitely used. An example below with just 4 list items is  
  xx   
 Now, I'm pretty sure that this works but (1) it seems incredibly useless and (2) It can not be that I need to run it more often? What is a better way to do this?   
 
 
 What you should do:  
 
 
 the order in which Your elements are dependent on one another: i.e.,  x1 - & gt; X2 ,  x2 - & gt; X3 , and so on.   
 
 Make your list in that order.   
 
 One    
 
 Reorder your list for your readability restriction.