MATLAB Programming

Characters and Strings
A = isletter(mystring)
A =
1 1 1 1 0 0 0 0
The first four elements in A are logical 1 (true) because the first four
characters of mystring are letters.
Searching and Replacing
MATLAB provides several functions for searching and replacing characters in
a string. (MATLAB also supports search and replace operations using regular
expressions. See “Regular Expressions” on page 3-31.)
Consider a string named label:
label = 'Sample 1, 10/28/95';
The strrep function performs the standard search-and-replace operation.
Use strrep to change the date from '10/28' to '10/30':
newlabel = strrep(label, '28', '30')
newlabel =
Sample 1, 10/30/95
findstr returns the starting position of a substring within a longer string. To
find all occurrences of the string 'amp' inside label, use
position = findstr('amp', label)
position =
2
The position within label where the only occurrence of 'amp' begins is the
second character.
The strtok function returns the characters before the first occurrence of a
delimiting character in an input string. The default delimiting characters are
the set of white-space characters. You can use the strtok function to parse a
sentence into words. For example,
function allWords = words(inputString)
remainder = inputString;
allWords = '';
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