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Index: R

r command (sed) : 5.11. Reading and Writing Files

rand() : 9.1.3. Random Number Generation

random numbers : 9.1.3. Random Number Generation

range of characters : (see character classes)

--re-interval option (gawk) : 11.2.3.1. Command line options

read command : (see r command (sed))

reading : 10.1. The getline Function

from files

5.11. Reading and Writing Files
10.1.1. Reading Input from Files

from pipe : 10.1.3. Reading Input from a Pipe

readsource script (example) : 13.6. readsource - Format Program Source Files for troff

RECLEN variable (tawk) : 11.3.2.1. Tawk language extensions

records, awk

2.4.1. Running awk

7.5. Records and Fields

B.2.1. Records and Fields

arrays and : 8.4. Arrays

fixed-length (tawk) : 11.3.2.1. Tawk language extensions

multiline : 7.7.1. Working with Multiline Records

NF variable : 7.7. System Variables

NR variable

7.7. System Variables
8.4. Arrays
10.1.2. Assigning the Input to a Variable

RT variable (gawk) : 11.2.3.5. Regular expression record terminators

separators for : (see delimiters)

redirection

2.3.2.1. Saving output
4.3. Testing and Saving Output
10.5. Directing Output to Files and Pipes

references : Other Sources of Information About sed and awk

referencing fields

2.4.1. Running awk
7.5.1. Referencing and Separating Fields

regular expressions

1.4. Four Hurdles to Mastering sed and awk

3. Understanding Regular Expression Syntax

B.2.3. Patterns

B.2.4. Regular Expressions

(see also pattern matching)

as constants : 7.8. Relational and Boolean Operators

delimiters for

2.1. Awk, by Sed and Grep, out of Ed
5.3. Substitution

dynamic, faking : 11.1.5. Faking Dynamic Regular Expressions

ed and : 2.1. Awk, by Sed and Grep, out of Ed

examples of : 3.3. I Never Metacharacter I Didn't Like

gawk extensions to : 11.2.3.4. Extended regular expressions

metacharacters for : (see netacharacters)

POSIX standard for : 3.2.4.3. POSIX character class additions

RS variable as

11.2.1.6. Regular expression record separators (gawk and mawk)
11.3.2.1. Tawk language extensions

tawk and : 11.3.2.1. Tawk language extensions

union of

3.2. A Line-Up of Characters
3.2.9. Alternative Operations

writing : 3.2.3. Writing Regular Expressions

relational expressions : B.2.3. Patterns

relational operators : 7.8. Relational and Boolean Operators

replacement metacharacters : 5.3.1. Replacement Metacharacters

numbered saves : 5.3.1. Replacement Metacharacters

replacing text

1.2. A Stream Editor
3.2.12.1. The extent of the match

retrieving data from files : 7.11. Information Retrieval

return statement

9.3. Writing Your Own Functions
9.3.1. Writing a Sort Function

revision control systems : 10.7.1. Make a Copy

RS variable : 7.7. System Variables

regular expression for

11.2.1.6. Regular expression record separators (gawk and mawk)
11.3.2.1. Tawk language extensions

RT variable (gawk) : 11.2.3.5. Regular expression record terminators

rules, pattern-matching : (see pattern matching)

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