lookBehindBoundary - Match boundary following specified pattern - MATLAB (original) (raw)

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Match boundary following specified pattern

Since R2020b

Syntax

Description

[newpat](#mw%5F5782a723-dafd-4280-a818-60e415878935%5Fsep%5Fmw%5F2527cdca-90c8-43b1-8ea8-8fa52700322c) = lookBehindBoundary([pat](#mw%5F5782a723-dafd-4280-a818-60e415878935%5Fsep%5Fmw%5F619a0af2-3091-404f-9c61-e268bcf7fbcb)) creates a pattern that matches the end of pat. Text matched bypat is not included in the result.lookBehindBoundary can be negated using the ~ operator. When negated, ~lookBehindBoundary matches between any characters that are not at the end of pat.

example

Examples

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Create a pattern that matches behind "b" or "2".

txt = "abc 123"; pat = lookBehindBoundary("b"|"2");

Use replace to insert "|" characters at the matched boundaries.

Use the ~ operator to negate lookBehindBoundary.

Create a pattern that matches digits except for those that directly follow "b" or "2".

txt = "abc 123"; pat = ~lookBehindBoundary("b"|"2");

Use replace to insert "|" characters at the negated boundaries.

Input Arguments

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Input pattern, specified as a pattern, string array, character vector, or cell array of character vectors.

Data Types: char | string | pattern | cell

Output Arguments

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Output pattern, returned as a pattern or an array of pattern objects.

Extended Capabilities

Version History

Introduced in R2020b