MATLAB string processing functions

% String processing
A = 'a'; B = 'B'; C = 'cccccc'; M =''
% Get String Length
Length()
% Connects two strings. the rightmost space of each string is trimmed.
D =Strcat(A, c)
Length (d)
% Connects multiple lines of strings. The length of each line can be different. the rightmost side of the non-longest string is automatically filled with spaces.
% Equal to the longest string, the Null String is ignored
E =Strvcat(A, B, m)
Size (E)
% Char connection, empty strings will be filled with spaces
F =Char(A, B, m)
Size (f)

%StrcmpChecks whether two strings are completely equal. Yes, returns true. Otherwise, returns false.
%StrncmpChecks whether the first n characters of two strings are equal. If yes, true is returned. Otherwise, false is returned.
%StrcmpiChecks whether the two strings are completely equal. case-insensitive characters are ignored.
%StrncmpiChecks whether the first n characters of two strings are equal. case insensitive.

%IsletterIndicates whether each character in a string belongs to an English letter.
%IsspaceChecks whether each character in a string belongs to a format character (space, carriage return, tabulation, line break, etc)
%IsstrpropChecks whether each character belongs to a specified range.
A = 'd sdsd 15 #';
B = isletter ()
C = isspace ()

% String replacement and search
%StrrepString replacement, case sensitive
% Strrep (str1, str2, str3)
% It replaces all str2 strings in str1 with str3

%Strfind(STR, Patten) Check if 'str' contains 'pattern' and return the location where it appears. No empty array is returned.
%Findstr(Str1, str2) in str1 and str2, the position where the shorter string appears in the longer string. No empty array is returned.
%Strmatch(Patten, STR) Check whether Patten is consistent with the leftmost part of Str.
%Strtok(STR, char) returns the part before and after the string specified by char in Str,
Mm = 'youqwelcome ';
[MM1, mm2] = strtok (mm, 'q ')

% Blanks (n) Create a string consisting of n Spaces
% Deblank (STR) trim the trailing space of the string
% Strtrim (STR) trim the spaces at the beginning and end of the string, tabulation, and carriage return.

% Lower (STR) converts letters in the string to lowercase letters.
% Upper (STR) converts the letters in the string to uppercase.
% Sort (STR) sorts strings according to their ASCII values.

% Num2str convert a number to a numeric string
% Str2num convert a numeric string to a number
% Mat2str convert the array to a string
% Int2str converts a numeric array to a character array composed of integer numbers

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String comparison in cell array:

C = cell (2, 1 );
C (1, 1) = cellstr ('xxx ');
C (2, 1) = cellstr ('yyyyy ');
Strcmp (c {1, 1}, c {2, 1 });

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Isequal test Arrays for equality, which can be used to compare whether the two character arrays are the same.

reprinted address: http://www.cnblogs.com/emanlee/archive/2012/09/13/2683912.html