Text mining, Database Management System

Text Processing:

Use readLines to read SOU.txt into R. Create a vector called Pres containing the names of the presidents giving each speech. To do this, rst identify the lines containing this information, then use the tagging and back-referencing strategy we covered in class. Remove any whitespace at the beginning or end of the strings.

 Create an empty list using the command

speech.words <- vector("list", length(Pres))

Note that length(Pres) is the total number of speeches. Now loop over the speeches and ll in the elements of each list as follows. Each element in the list should be a character vector, where each element of the vector is a word in the speech. Hint: For a given speech (one iteration in the loop), rst put the text of the speech into one long character vector (where in relation to the delimiters does it start and stop?), then use the function strsplit to break it up. There are more careful ways to do this, but you can consider \word characters" to
consist only of letters, so that what de nes the breaks between words is one or more \non-word characters.

Posted Date: 2/23/2013 1:51:10 AM | Location : United States







Related Discussions:- Text mining, Assignment Help, Ask Question on Text mining, Get Answer, Expert's Help, Text mining Discussions

Write discussion on Text mining
Your posts are moderated
Related Questions
Submission Requirements All answers must be computer generated (including text and diagrams). The hand-in version must include a header page (or with sufficient space)

please describe the data base management with the easy example &give the application?

Find out the names and company names of all employees sorted in ascending order of company name and descending order of employee names of by which company. SELECT EMPLOYEE_NAME,

(A) For the relation; CarSales (RegNo, BuyerName, Address, SalesPerson, Make, Model, Commission) The following functional dependences hold, RegNo _ID à Make, Model Reg

Explain the structure of well formed formulae in relational calculus. Ans: a. An atom is a formula b. If P1 is a formula, after that so are ¬P1 and (P1) c. If P1 and P2 a

(a) Differentiate between information and data . (b) List and briefly explain five potential benefits of the database approach compared to conventional file systems. (c) Diff

Explain forms based and graphical interface? Forms based and graphical interface: graphical user interface (GUI) is a kind of user interface which permits people to interact

Describe the Association: Design  Before we describe association design let us define association "Association is set of links between two objects in the object model". It is

What is the use of keyword ISA? The use of keyword ISA is to show that a class is a specialization of another class.

Determine the rule that a value of a foreign key should appear as a value of some particular table is called a  Ans: Referential constraint.    The rule that a value of a fo