how to check if inputs for my function are strings or vectors

like for my function, when the user inputs an argument that is not a string or vector, i want them to receive an error and for it to say "Input must be a string or vector."

this is what i have so far:

function [output] = function(input1, input2, input3)
if ~isstring(input1) || nargin==3 && ~isstring(input2) || nargin==3 && ~isstring(input3)
    error('Input must be a string or vector.')
elseif ~isvector(input1) || nargin==3 && ~isvector(input2) || nargin==3 && ~isvector(input3)
    error('Input must be a string or vector.')
    
end

[Stephen23]

https://www.mathworks.com/help/matlab/matlab_prog/function-argument-validation-1.html

[Stephen23]

Original question:

https://web.archive.org/web/20221204154859/https://webcache.googleusercontent.com/search?q=cache:lGwxBVVAddoJ:https://www.mathworks.com/matlabcentral/answers/1870582-how-to-check-if-inputs-for-my-function-are-strings-or-vectors

[Matt J]

Back up copy of original question:

like for my function, when the user inputs an argument that is not a string or vector, i want them to receive an error and for it to say "Input must be a string or vector."

this is what i have so far:

function [output] = function(input1, input2, input3)
if ~isstring(input1) || nargin==3 && ~isstring(input2) || nargin==3 && ~isstring(input3)
    error('Input must be a string or vector.')
elseif ~isvector(input1) || nargin==3 && ~isvector(input2) || nargin==3 && ~isvector(input3)
    error('Input must be a string or vector.')

[Jan]

@carly: This public forum is based on sharing questions and answers. If you have found a solution by your own, post it as answer. Deleting the contents of the question is not helpful and shows a missing repect for the given answers. Therefore you question has been restored.

Answer 1

[Matt J]

function [output] = function(varargin)

 varargin(4:end)=[];

 valid=all( cellfun(@(z)isstring(z) | isvector(z),varargin) );

 assert(valid,'Input must be string or vector');

end