Effacer les filtres
Effacer les filtres

Text mining. Using Regular Expression

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Afeez Oyedeji
Afeez Oyedeji le 5 Jan 2020
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')

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Max Murphy
Max Murphy le 5 Jan 2020
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:
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'

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