Hello everyone,
I have two vectors having only one element different:
                           vector1         vector2                       
vector1

                           TWC             TWC                            
TWC
                           VFC              TWX                            
NA 
                          VIA/B             VFC                             
VFC
                          WHR             VIA/B                            
VIA/B
                           WPO             WHR   --------->>>        WHR
                           WYN             WPO                            
WPO
                           WYNN          WYN                              
WYN
                           YUM            WYNN                            
WYNN
                           NA               YUM                              
YUM
In that case, in the first vector, the value twx is missing . What I want to
do is doing the following avoiding loop:
putting the NA row in front of the TWX row as this would be the row where
the value is missing. I don't know if there is any function doing this. I
thought about using a which() function to retrieve all the missing elements
index ( twx, 1 here) and insert them in the right index in the first vector
but how can I insert in a vector, is there an appropriated function? thank
you

-----
Anna Lippel
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