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

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yashar khatib shahidi
评论： Star Strider 2015-5-24
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 2015-5-23
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.
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Image Analyst
Image Analyst 2015-5-23
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 2015-5-24
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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yashar khatib shahidi
Thanks.
Jan
Jan 2015-5-24
Or:
sum(isstrprop(string, 'alpha'))

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