function len = strlength(s)

%STRLENGTH Lengths of text elements.

%   L = STRLENGTH(STR) returns the number of characters in STR.

%

%   STR can be a string array, a character vector, or a cell array of

%   character vectors. If STR is a string array or cell array, then L is a

%   numeric array, where each element is the number of characters in the

%   corresponding element of STR.

% 

%   Example:

%       STR = "data.xlsx";

%       strlength(STR)      

%

%       returns  

%

%            9

% 

%   Example:

%       STR = 'annualReport.docx';

%       strlength(STR)      

%

%       returns  

%

%           17

% 

%   Example:

%       STR = ["funds.xlsx";"demo.ppt"];

%       strlength(STR)      

%

%       returns  

%

%           10

%            8

%

%   See also LENGTH.

%   Copyright 2014-2017 The MathWorks, Inc.

    narginchk(1, 1); 

    if ischar(s) && (isempty(s) || isrow(s)) 

        len = numel(s); 

    elseif iscell(s) 

        len = zeros(size(s)); 

        for idx = 1:numel(s) 

            element = s{idx}; 

            if ischar(element) && (isempty(element) || isrow(element)) 

                len(idx) = numel(element); 

            else

                error(firstInputErrorMessage);

            end 

        end 

    else

        error(firstInputErrorMessage);

    end 

end