Graphing Data with R

Appendix H. R Functions Introduced in This Book

Here is a list of functions used in this book, for quick  reference. It is far from a complete list of R functions. For further information about a given function, x, see the index, or type help(x) or ?x.

Data Input/Output

load()

Reload an R dataset previously created by using save().

open.ncdf()

Open an .ncdf file (ncdf package).

Quandl()

Read a Quandl dataset (Quandl package).

read.csv()

Read a file in .csv format and create a data frame.

read.fwf()

Read a fixed-width file.

read.spss()

Read an SPSS dataset (foreign package).

read.table()

Read a file in table format and create a data frame.

read.txt()

Read a file in .txt format and create a data frame.

read.xport()

Read an SAS XPORT file (foreign package).

readWorksheetFromFile()

Read an Excel spreadsheet (XLConnect package).

save()

Write an R object to the working directory or a specified file.

xmlToDataFrame()

Read an XML file (XML package).

Datasets

attach()

Select a particular dataset for the following analysis.

data()

Determine what datasets are available (with no argument) or load a dataset.

data.frame()

Combine two or more vectors to make a new data frame.

detach()

Deselect a dataset; that is, following commands no longer analyze that dataset.

edit()

Edit a dataset.

fix()

Edit a dataset.

head()

View selected lines of a dataset, from the top.

str()

Determine the structure of an object.

subset()

Create a subset of a specified data frame.

tail()

View selected lines of ...