One thing I do not like R is that operations on String in R
are not as convenient as in other programming langauges such as Java, Python and Ruby.
In these 3 programming languages,
you can simply use + to concatenate strings while in R you have to use the function paste.
The inconvenience result from unable to overload functions and operators in R.
However, you can still define/override operators in R.
For example,
the following code renew the definition of + to concatenate two strings.
"+" = function(x,y){
paste(x,y,sep="")
}