Is it possible to use logical indexing to specify between a number interval and include a value outside that interval.

I'm trying to use logical vectoring to exclude certain characters by using a mask on a string. So say I had a string like str='This !is @tes#t'. I'm trying to get "This is test". I'm donig this by converting the strings to doubles and then setting all characters to upper. Finally creating a mask that is between 65 and 90. I also need the mask to include 32 so I can keep spaces between words. How can I include that? Alternatively is there a better way to only include the alphabetic characters in a mask?

str='This !is @tes#t'

Ustr=upper(str)

Mask = 65<=Ustr & Ustr<=90

Answer 1

[James Tursa]

E.g.,

Mask = ismember(str,[' ','a':'z','A':'Z']);

Or using your method

Mask = (65<=Ustr & Ustr<=90) | Ustr == 32;

[Confidential Confidential]

Thank you. The pitful of being new is you don't even begin to know the functions of the language.

Answer 2

[Steven Lord]

You could use the isstrprop function to keep alphabetic letters and whitespace characters.

str='This !is @tes#t';
letters = isstrprop(str, 'alpha');
spaces = isstrprop(str, 'wspace');
str(letters | spaces)