R: Locale-Insensitive Fixed Pattern Matching in 'stringi'

stringi-search-fixed {stringi} | R Documentation

## Locale-Insensitive Fixed Pattern Matching in stringi

### Description

String searching facilities described here provide a way to locate a specific sequence of bytes in a string. The search engine's settings may be tuned up (for example to perform case-insensitive search) via a call to the `stri_opts_fixed` function.

### Byte Compare

The fast Knuth-Morris-Pratt search algorithm, with worst time complexity of O(n+p) (`n == length(str)`, `p == length(pattern)`) is implemented (with some tweaks for very short search patterns).

Be aware that, for natural language processing, fixed pattern searching might not be what you actually require. It is because a bitwise match will not give correct results in cases of:

1. accented letters;

2. conjoined letters;

3. ignorable punctuation;

4. ignorable case,

see also stringi-search-coll.

Note that the conversion of input data to Unicode is done as usual.

### See Also

Other search_fixed: `stri_opts_fixed()`, `stringi-search`

Other stringi_general_topics: `stringi-arguments`, `stringi-encoding`, `stringi-locale`, `stringi-package`, `stringi-search-boundaries`, `stringi-search-charclass`, `stringi-search-coll`, `stringi-search-regex`, `stringi-search`

[Package stringi version 1.4.6 Index]