Replacing special character 'É' to 'E'
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Hi,
Is there a Matlab function to replace the special characters (like 'É') to the regular UTF-8 or ISO-8859-1?
Thanks,
1 Commento
Stephen23
il 28 Nov 2022
"regular UTF-8 or ISO-8859-1"
Both UTF-8 (encodes all Unicode characters) and ISO-8859-1 include "É"... Perhaps you meant to ask something like "how to remove diacritics from characters?", which would match your question title.
Risposta accettata
Jonas
il 28 Nov 2022
looks like there are only manual solutions.
Stackoverflow is your friend ;-)
6 Commenti
Jonas
il 29 Nov 2022
also it is qeustionable to do this whole thing since the change of letters can change th emeaning of the words, also in German for example, ä, ö and ü are changed to ae, oe and ue, but the same procedure does not make sence in other languages like turkish
Stephen23
il 12 Dic 2023
Modificato: Stephen23
il 14 Dic 2023
@Jonas: your concern is well-founded. That function confuses two related (yet distinct) aspects of languages:
- splitting ligatures (sometimes used with lexicographical sorting)
- diacritics in graphemes
Note that ligatures are not diacritics, so splitting the ligatures Æ,Œ, etc. is not removing diacritics. The esszett character ß also does not have any diacritics nor is it considered to be a ligature (although it does derive from one). The lexicographical sorting rules of some languages do require treating those ligatures and characters as being equivalent to some other characters.... but that is distinct from removing diacritics from characters.
The function also fails to remove diacritics from other (even Latin-based) characters, e.g. Ǣ.
The function also returns the wrong character in some cases, e.g. eth ð has no diacritic. That it is commonly transliterated into latin script as d is irrelevant (and misleading: the digraph th would be better).
In short: the function is misnamed and does not really do what it claims.
Più risposte (2)
Stephen23
il 28 Nov 2022
Modificato: Stephen23
il 28 Nov 2022
"Is there a Matlab function to replace the special characters (like 'É')"
You can call Python from MATLAB, and it can do the heavy-lifting:
inp = 'É';
baz = @(v)char(v(1)); % only need the first decomposed character.
out = baz(py.unicodedata.normalize('NFKD',inp)) % to remove diacritics.
Read more:
0 Commenti
John D'Errico
il 28 Nov 2022
Modificato: John D'Errico
il 28 Nov 2022
Easy peasy.
str = 'ABCDEFGHIJKÉÉÀÀÄÄabcdefghijkl'
strrep(str,'É','E')
If there are other special characters you want replaced, strrep will handle them too, but it looks like you would need to do them one at a time with strrep. But other tools would certainly work too. Certainly regexp, but I've never been very good at regular expressions. :) This will work though:
badchar = 'ÉÀÄ';
goodchar = 'EAA';
[u,v] = ismember(str,'ÉÀÄ');
str(u) = goodchar(v(u))
1 Commento
Robert Wagner
il 12 Dic 2023
but I've never been very good at regular expressions. :) ---> I've never tried to be in the first place... :-)))
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