[R] proportion

[LCOG1]

Hi , 
 SO i have been on a role of asking simple questions lately.  So much for
feeling like im getting this R business.  

I wrote a script 2 weeks ago that utilized "proportion" to turn values in a
table (from "table") into proportions to then graph.  I now get an error
that proportion is not a function so im confused.  I ran the script a few
times and im thinking maybe i had another library loaded from a previous
process and that it wasnt listed in my script and now isnt being loaded.  So
question is what library do i need to load or what other updates or changes
have been made that now R cant find proportion?

Probably useless with other code/data:
 textplot(paste(names(TrkSUV.Ag[[zp]]),proportion(TrkSUV.Ag[[zp]])),
halign="center", valign="center",cex=1)
  
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