[R] Barplot axis titles

[RagingJim]

ok, used the lapply function and now the "Years" column is the numeric type.
However, I still get the same error as above. Replacing either "kent[1,1]"
or "kent[dimkent[1],1]" with a number, gives me the same error. If both
terms are replaced with a number, then it does not produce an error. It then
runs, and the number "1" is the only number on the bottom axis. However
after the next line:

if(kent[dimkent[1],2]%%20) axis.ticks<-axis.ticks[-length(axis.ticks)]

I get this error:

"Error in kent[dimkent[1], 2]%%20 : 
  non-numeric argument to binary operator"

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