stringi-search-fixed {stringi} | R Documentation

## Locale-Insensitive Fixed Pattern Matching in stringi

### Description

String searching facilities described in this very man page provide a way to locate a specific sequence of bytes in a string. Fixed pattern search engine's settings may be tuned up (for example to perform case-insensitive search), see the `stri_opts_fixed` function for more details.

### Byte Compare

The Knuth-Morris-Pratt search algorithm, with worst time complexity of O(n+p) (`n == length(str)`, `p == length(pattern)`) is utilized (with some tweaks for very short search patterns). For natural language processing, however, this is not what you probably want. 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 1.1.5 Index]