Reading in, Accessing, and Summarizing Data in R

How to read in data, subset it, summarize it, obtain common statistics about it, access variables, rename variables, index the data, put data into lists and lots of gotchas.

Function List:
read.table()
read.csv()
file.choose()
names()
colnames()
rownames()
dim()
summary()
mean()
median()
max()
min()
length()
which()
which.max()
which.min()
list()

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