Text mining. Using Regular Expression

hi, please i need someone to explain this paritcular regular expression to me. What type of string can i use in the expression as i want the outpuf to be split? Thanks in advance.

regexpi ('string','\x','split')

Answer 1

[Max Murphy]

It depends on how you would like to split the input. As entered, your expression evaluates to

>> test = regexpi('string','\x','split')

test =

  cell

    'string'

The metacharacter '\x' is used if you have the hexadecimal value of a desired character that you want to match. For all the metacharacters, see:

https://www.mathworks.com/help/matlab/ref/regexpi.html#btq_v8b_sep_shared-expression

If you wanted to split an arbitrary string anywhere that it had a certain hexadecimal character, then you would have to specify the hexadecimal value after '\x'. For example

% ASCII hex value for character for 'i' is 69
>> test = regexpi('string','\x69','split')

test =

  1×2 cell array

    'str'    'ng'

To recover the hex value for a given character, you could use dec2hex

>> dec2hex('i')

ans =

    '69'