Send a text string containing double quotes to function

Question

I\'m having a problem with using double quotes while formatting text strings being sent to functions in R.

Consider an example function code:

foo <         


        

Answer 1

Two ways I know. First is to just use single quotes to start and end the character string:

> cat( 'Learning "R" is fun!' )
Learning "R" is fun!

Second is to escape the double quotes:

> cat( "Learning \"R\" is fun!" )
Learning "R" is fun!

Note that this works because I use cat, which is intended to output strings to the console. It seems you use print() which shows the object rather than output it

Answer 2

You can try these approaches:

foo <- function(numarg = 5, textarg = "** Default text **" ){ 
    cat(c(textarg, "\n")) 
    val <- (numarg^2) + numarg
    return(val) 
}

foo <- function(numarg = 5, textarg = "** Default text **" ){ 
    print(noquote(textarg)) 
    val <- (numarg^2) + numarg
    return(val) 
}

foo( 4, "Learning R is fun!" )
foo( 4, 'Learning "R" is fun!' )