[程序分享] youtube上的一个Google Developer Live 的 R教程，转给墙内的同学 [推广有奖]

视频地址
http://www.youtube.com/playlist?list=PLOU2XLYxmsIK9qQfztXeybpHvru-TrqAP

Series of tutorials for developers in R

R 1.1 - Initial Setup and Navigation-iffR3fWv4xw.zip (14.07 MB) 本附件包括：

• R 1.1 - Initial Setup and Navigation-iffR3fWv4xw.mp4

2013-7-12 20:32:41 上传

Strategies that will make beginning R users more efficient: writing code using a "script" and navigating through directories within R.

R 1.2 - Calculations and Variables-S-o-sdlzhkE.zip (9.97 MB) 本附件包括：

• R 1.2 - Calculations and Variables-S-o-sdlzhkE.mp4

2013-7-12 20:36:29 上传

Get acquainted with performing basic computations in R, creating R objects (sometimes called "variables"), and seeing and running earlier commands that were run in the console.


R 1.3 - Create and Work With Vectors-YhQOV27pQfg.zip (18.54 MB) 本附件包括：

• R 1.3 - Create and Work With Vectors-YhQOV27pQfg.mp4

2013-7-12 20:43:56 上传

Learn how to create a vector in R using the c() function and the colon-notation (e.g. 1:5), find the length of a vector using the length() function, and subset vectors with bracket-notation and the head() and tail() functions.


R 1.4 - Character and Boolean Vectors-GKu5tw_bIpA.zip (10.32 MB) 本附件包括：

• R 1.4 - Character and Boolean Vectors-GKu5tw_bIpA.mp4

2013-7-12 20:47:40 上传

So far we've seen objects that use numbers, but R is also built to handle more types of objects. Here we explore vectors that contain strings or Boolean values (TRUE / FALSE).


R 1.5 - Vector Arithmetic-u5hroyx0J4o.zip (17.92 MB) 本附件包括：

• R 1.5 - Vector Arithmetic-u5hroyx0J4o.mp4

2013-7-12 20:54:08 上传

This video demystifies the different ways R performs vector arithmetic (e.g. addition and multiplication), covering topics including element-wise arithmetic, vector recycling, and how some functions are automatically applied across the ele…


R 1.6 - Building and Subsetting Matrices-cR-hEUs1rRw.zip (24.04 MB) 本附件包括：

• R 1.6 - Building and Subsetting Matrices-cR-hEUs1rRw.mp4

2013-7-12 21:03:27 上传

Learn how to create a matrix with dimensions of your choosing, how recycle a vector when creating a matrix, and how to query specific characteristics of the vector using functions such as dim(), head(), and tail(). Details and potential …


R 1.7 - Section 1 Review and Help Files-mtu5_IYhgpg.zip (19.61 MB) 本附件包括：

• R 1.7 - Section 1 Review and Help Files-mtu5_IYhgpg.mp4

2013-7-12 21:16:09 上传

A quick review of the topics covered in the Section 1 videos: vectors, matrices, subsetting, and a few standard functions. Also learn how to access help files in R.


R 2.1 - Loading Data and Working With Data Frames-qK1ElUMkhq0.zip (30.69 MB) 本附件包括：

• R 2.1 - Loading Data and Working With Data Frames-qK1ElUMkhq0.mp4

2013-7-12 22:03:22 上传

Get a refresher on navigating directories on your computer in R, and learn to load a CSV (comma-separated values) data set in the form of a "data frame" using the read.csv() function, which is a special type of data matrix. This vide…


R 2.2 - Loading Data, Object Summaries, and Dates-cx_3zWo4sUs.zip (28.66 MB) 本附件包括：

• R 2.2 - Loading Data, Object Summaries, and Dates-cx_3zWo4sUs.mp4

2013-7-12 22:15:41 上传

Learn how to load data in the form of a tab-delimited text file using the read.delim(), how to get a high-level overview of an R object using the str() and summary() functions, and get a crash-course into working with dates in R with an exa…


R 2.3 - if() Statements, Logical Operators, and the which() Function-eVEx_pBEkRI.zip (43.12 MB) 本附件包括：

• R 2.3 - if() Statements, Logical Operators, and the which() Function-eVEx_pBEkRI.mp4

2013-7-12 22:37:26 上传

if-else statements are a key component to any programming language. This video introduces how to effectively use these statements in R and also clarifies some nuances of logical operators in R. Two related functions are also intro…


R 2.4 - for() Loops and Handling Missing Observations-djI-yfk-DZM.zip (31.49 MB) 本附件包括：

• R 2.4 - for() Loops and Handling Missing Observations-djI-yfk-DZM.mp4

2013-7-12 22:52:29 上传

This video discusses for() loops, which are a structure that can be used to execute a set of code repeatedly. Also covered in this video are the min(), max(), and append() functions, as well as how to identify and omit missing value…


R 2.5 - Lists-UffunYeERV0.zip (19.12 MB) 本附件包括：

• R 2.5 - Lists-UffunYeERV0.mp4

2013-7-12 23:00:46 上传

Learn how to create and use lists in R, which are dynamic, flexible R objects that can hold and organize other R objects.


R 3.1 - Managing the Workspace and Variable Casting-8oc3mIa0TCw.zip (20.15 MB) 本附件包括：

• R 3.1 - Managing the Workspace and Variable Casting-8oc3mIa0TCw.mp4

2013-7-12 23:12:05 上传

View all the objects in the workspace using ls(), remove objects using rm(), cast a variable as a different type using an as.[type]() function, and use lists or data frames to organize data or results.

R 3.2 - The apply() Family of Functions-WuCVs3bW-ZY.zip (44.46 MB) 本附件包括：

• R 3.2 - The apply() Family of Functions-WuCVs3bW-ZY.mp4

2013-7-12 23:35:23 上传

When data are organized in a matrix or data frame, the apply() function can be used to calculate summaries (or apply a more complex function) across either the rows or columns of the data object. Or if summaries for each group (level) …

R 3.3 - Access or Create Columns in Data Frames, or Simplify a Data Frame using .zip (16.44 MB) 本附件包括：

• R 3.3 - Access or Create Columns in Data Frames, or Simplify a Data Frame using aggregate()-pZ6Bnxg9E8w.mp4

2013-7-12 23:44:55 上传

The with() function makes it easy to access many variables (columns) in a data frame for one-off calculations, the within() function can be used to create new columns that are merged with the original data frame, and aggregate() is…


R 4.1 - Basic Structure of a Function-Z1wB1rHAYzQ.zip (12.16 MB) 本附件包括：

• R 4.1 - Basic Structure of a Function-Z1wB1rHAYzQ.mp4

2013-7-12 23:55:22 上传

This video introduces the basic structure of a function, covering the declaration of the function, using an argument, and returning a result.


R 4.2 - Returning a List and Providing Default Arguments-DzIy6U-N6ac.zip (15.08 MB) 本附件包括：

• R 4.2 - Returning a List and Providing Default Arguments-DzIy6U-N6ac.mp4

2013-7-13 00:02:47 上传

Become more proficient in writing functions by learning the standard way to return more complex results from functions using a list, and learn how to specify a default value for an argument.


R 4.3 - Add a Warning or Stop the Function Execution-29TdKkUmcA4.zip (12.21 MB) 本附件包括：

• R 4.3 - Add a Warning or Stop the Function Execution-29TdKkUmcA4.mp4

2013-7-13 00:08:56 上传

The most helpful functions return clear warnings and errors when something is wrong. This video introduces the warning() and stop() functions, which can be used within a function to report a warning to the user or stop the functio…


R 4.4 - Passing Additional Arguments Using an Ellipsis-O3Bf2hM_gNc.zip (27.55 MB) 本附件包括：

• R 4.4 - Passing Additional Arguments Using an Ellipsis-O3Bf2hM_gNc.mp4

2013-7-13 00:21:20 上传

Sometimes it is useful to be able to pass any extra arguments to another function. For example, if a new plotting function is created that makes use of the function called plot(), it would be useful to be able to be able to specify add…


R 4.5 - Make a Returned Result Invisible and Build Recursive Functions-CHmmHfJ8hCA.zip (13.21 MB) 本附件包括：

• R 4.5 - Make a Returned Result Invisible and Build Recursive Functions-CHmmHfJ8hCA.mp4

2013-7-13 00:26:40 上传

Use the invisible() function in place of return() in a function to prevent the output from printing to the user's screen but still allow the result to be stored into an R object. Additionally, when building a recursive function, use the Recall() fu…


R 4.6 - Custom Functions With apply()-H06_Ic_kDvI.zip (17.46 MB) 本附件包括：

• R 4.6 - Custom Functions With apply()-H06_Ic_kDvI.mp4

2013-7-13 00:34:03 上传

In the last section of videos, the apply() function was introduced. A prebuilt function is often used in this function, but it is also common to write a new function within apply() or to apply a custom function.