Edits to make novice R lesson 01 more similar to novice Python lesson 01.

I have made edits so that the first R lesson more closely follows the Python lesson. It covers all the same topics save two:

  + Loading external packages - omitted because none of the operations in the lesson require loading an external package.
  + How to display three plots side-by-side - omitted because this is more complicated in R. This would require discussing how to set and reset `par` options, which is not a beginner topic.

Here's how you can quickly compare the two rendered files:

```
# clone bc repo
git clone git@github.com:swcarpentry/bc.git
# create and switch to new branch
git checkout -b review-pr
# add remote
git remote add jdb git@github.com:jdblischak/bc.git
# pull changes from my branch
git pull jdb 01-starting-with-data
# build site locally
make site
```
Then compare the rendered files  `_site/novice/r/01-starting-with-data.html` and `_site/novice/python/01-numpy.html`.
It seems like this is a question of teaching users to find files using
their operating system (e.g. navigate to the file, and open it using
RStudio, vs teaching users to find files from within RStudio.

I have very little knowledge of how most people interact with a computer.
 If I sent most people a Word .docx file,  do they click on the document
and it opens up in Word?  Or do they click on a button to launch MS Word,
and then navigate to where my document is?  My guess is the former, which
suggests we the former would be the most familiar starting place for
RStudio too (e.g. navigate in the operating system instead of in the
software).


On Thu, Aug 21, 2014 at 11:45 AM, John Blischak <notifications@github.com>
wrote:

> In novice/r/01-starting-with-data.Rmd:
>
> >
> > -Words are useful, but what's more useful are the sentences and stories we use them to build.
> > -Similarly, while a lot of powerful tools are built into languages like R, even more lives in the libraries they are used to build.
> > -Importing a library is like getting a piece of lab equipment out of a storage locker and setting it up on the bench.
> > -Once it's done, we can ask the library to do things for us.
> > +To load our inflammation data, first we need to locate our data.
> > +We can change the current working directory to the location of the CSV files using the function `setwd`.
>
> But that was not what @gavinsimpson <https://github.com/gavinsimpson> was
> suggesting.
>
> Gavin wrote:
>
> Do we want to continue with this or try to educate people on starting R
> where they want to work? Easiest way to do the latter is to touch
> my-analysis.R in the relevant folder then open my-analysis.R in R. I
> presume this works in RStudio?
>
> This is how to accomplish that:
>
> cd path/to/project
> touch my-analysis.R
> rstudio my-analysis.R
>
> So to answer Gavin's questions: yes, RStudio supports this. However, the
> main downside of this approach is that it is so much easier to get the
> learners to just click on an icon on their desktop than try to get them to
> navigate to the correct working directory and launch RStudio. Also, I
> haven't tested it yet, but I don't know if the Windows Installer adds the
> RStudio executable to the path.
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/swcarpentry/bc/pull/639/files#r16558579>.
>



-- 
Carl Boettiger
UC Santa Cruz
http://carlboettiger.info/