Hi, 

I have (x, y) data as the follows (saved in the txt file):

x y 
1 8
2 5 
3 3 
4 + 
5 -1 
6 + 

When I read this txt file into R and attach this data, I found the output of y is as the follows  
[1] 8  5  3  +  -1 + 
Levels: -1 + 3 5 8

Could I get rid of Levels in the output? Because I need to use the observed y and x run regression first and then assign the value to the missing y later.

Thanks,


Kate 
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