Name

regexp — find a substring that matches the regular expression string

Calling Sequence

[start]=regexp(input,pattern,[flag])
[start,end,match]=regexp(input,pattern,[flag])
[start,end]=regexp(input,pattern,[flag])
[start,end,match]=regexp(input,pattern,[flag])

Parameters

input

a string.

pattern

a character string (under the rules of regular expression)

start

the starting index of each substring of str that matches the regular expression string pattern

end

the ending index of each substring of str that matches the regular expression string pattern

match

the text of each substring of str that matches pattern.

[flag]

'o' for matching the pattern once .

Description

The rules of regular expression are similar to perl language. For a quick start , see http://perldoc.perl.org/perlrequick.html. For a more in-depth tutorial on , see http://perldoc.perl.org/perlretut.html and for the reference page, see http://perldoc.perl.org/perlre.html

A difference with Perl is that matching a position but no character (for example, with /^/ or /(?=o)/) is a successful match in Perl but not in Scilab.

Examples

 
regexp('xabyabbbz','/ab*/','o')
regexp('a!','/((((((((((a))))))))))\041/')
regexp('ABCC','/^abc$/i')
regexp('ABC','/ab|cd/i')
[a b c]=regexp('XABYABBBZ','/ab*/i')

See Also

strindex