[R] Use function parameter as an unevaluated text string

John Sorkin JSorkin at grecc.umaryland.edu
Thu Jan 30 00:48:14 CET 2014

I would like to take a parameter passed to a function as a text string. I don't want the parameter evaluated, I want it uses exactly as passed,

doit <- function(data) {

cat("This function is using values from the data frame ",data,"\n")


mydata <- data.frame(x = c(1,2,3), y=c(3,2,1))

I would like to see the following printed

This function is using values from the data frame mydata

Thank you,

John David Sorkin M.D., Ph.D.
Professor of Medicine
Chief, Biostatistics and Informatics
University of Maryland School of Medicine Division of Gerontology and Geriatric Medicine
Baltimore VA Medical Center
10 North Greene Street
Baltimore, MD 21201-1524
(Phone) 410-605-7119
(Fax) 410-605-7913 (Please call phone number above prior to faxing) 

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