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How can I find the number of letters in a string? Just letters (A-Z, a-z)?

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How can I find the number of letters in a string? Just letters (A-Z, a-z)?

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Star Strider
Star Strider el 23 de Mayo de 2015
Easiest way:
string = 'This is a string.';
NrLtrs = length(regexpi(string, '[a-zA-Z]'));
The number of letters only is returned in the ‘NrLtrs’ variable.
  7 comentarios
Image Analyst
Image Analyst el 23 de Mayo de 2015
Why are you using textscan to simply get a string. That's too overkill for a simple case like this. Simply use fgetl() if you want to get line by line, or use fread() if you want to suck up the whole file in one shot.
Star Strider
Star Strider el 24 de Mayo de 2015
If it’s a cell, address it as a cell:
string = {'This is a string.'};
NrLtrs = length(regexpi(string{1}, '[a-zA-Z]'));
You will likely have to experiment with this idea in the context of your code to get the result you want.

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Más respuestas (2)

yashar khatib shahidi
yashar khatib shahidi el 23 de Mayo de 2015
Thanks.

Jan
Jan el 24 de Mayo de 2015
Or:
sum(isstrprop(string, 'alpha'))

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