Studying "R"

Here is a memo in studying "R", which is generated for calculating statistical calculation. Actually, I've installed this program in my machine 'MacBook Pro', which I purchased on last Sunday:)

I'm studying with a text book named "Exploring Everyday Things with R and Ruby" with Japanese version. Today's course is about basic confirmation about the programming language of "R", as I wrote in the first paragraph.

When I use some package with regard to "R", I was required to install the following program:


Also, here is my target package to install:


Anyway, I'd like to post my record of studying statistic or machine language or others here.