[R] R not recognizing words

[arabarkev]

Hello all

I'm new to R and am experiencing a problem with a categorical variable.  All
the data of this variable are "Low", "High", or NA.  When I put
summary(x$y), it gives me the number of High, Low, and NA entries.  However,
when I try to subset by writing     x$y=="Low"  or x$y=="High", R does not
recognize the word and it writes FALSE for all the entries (but not the NA
entries). 

Can anybody help me out?

Thanks
 



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