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I have been trying to attach a dataframe and to run 'cc ', this message keep repeating. Assist on how to overcome this.

Am using updated version of Windows 10

View(dd)
attach(dd)
cc(case,exp1)

Error: could not find function "cc"

library(epiDisplay)
Loading required package: foreign
Loading required package: survival
Loading required package: MASS
Loading required package: nnet
Warning messages:
1: package ‘epiDisplay’ was built under R version 3.3.3 
2: package ‘survival’ was built under R version 3.3.3 
3: package ‘MASS’ was built under R version 3.3.3 
4: package ‘nnet’ was built under R version 3.3.3
zx8754
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James
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