I was surprised to find recently that there are now over 15,000 lines of R code in the book I am working on. If I had written that much code in another ‘newly’ acquired language I would probably feel a lot more knowledgeable about it than I currently feel about R. Why don’t I feel more knowledgeable about R?
Those 15,000 lines are not all real lines, lots of cut-and-paste has been going on; yes, R is a cut-and-paste language just like Cobol and ‘web’ languages. ‘Real’ programmers often look down their noses at such languages, but that is just a failure on their part to understand what they are really all about. Perhaps I have written 5,000 actual lines of R, still a decent amount and half way to the 10,000 line minimum I ask newbies if they have reached.
An expert in a language should be able to pick up a random sample of code and to have been there, done that and got the t-shirt. I still regularly learn new stuff when reading other people’s code, so I’m still a long way from being an R expert. But then R is in the mold of a functional language and one characteristic of languages in this mold is that they provide umpteen different ways of doing the same thing. The combination of this language characteristic along with the lack of common culture in R usage (when this exists it significantly reduces the patterns of code usage commonly encountered) could mean that I am on the treadmill of forever and regularly learning new R coding techniques (which is great source for blog articles but gets tedious after a while); Perl is a lot like this.
As a compiler guy I’m used to learning a language by reading the language definition. Reading this document gives me a warm fuzzy feeling of knowing the language, this has nothing to do with being able to program in it and there is no way of knowing that I understood what the words meant. I was going to say that the R language definition was little more than some brief notes jotted down by somebody to be written up later, but checking the link to the page I discovered that somebody had been spending time significantly improving on what existed a few years ago; there is still a way to go but the R language definition is starting to look respectable. Hopefully my feeling of R knowledgeability will improve after I have read through this updated definition a few times.
Use of R is usually intimately bound up with the data being manipulated; on a per line of code basis much more so than other languages (in this regard it is like Cobol). Perhaps the need to have to learn lots more about the data than I normally have to adds to my feeling of not knowing. Would my feeling of knowledgeability increase if I worked with the same kind of data ll the time?