How to take variable number of inputs arugments and return their sum

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KayLynn 2013-10-29

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https://ww2.mathworks.cn/matlabcentral/answers/104272-how-to-take-variable-number-of-inputs-arugments-and-return-their-sum

评论： Image Analyst 2013-10-29

I am trying to write a functin addmany.m that takes zero or more numbers as a variable number of input arguments and returns the sum of its input arguments. I am trying to use the narargin and varargin commands. I have the following code written:

function [y] = main(varargin)
%This function will take zero or more numbers as a variable number of input 
%arguments and returns the sum of its input arguments.
switch nargin
    case 0 
        disp('0 inputs given')
        alpha = 10 %default value
        beta = 10 %default value
    case 1 
        disp('1 inputs given')
        alpha = varargin{1}
        beta = 10 %default value
    case 2
        disp('2 inputs given')
        alpha = varargin{1}
        beta = varargin{2}
    otherwise 
        error('Unexpected inputs')
end
y= alpha + beta;

I am trying to get the following result Input is 1,10,100 Output is 111.

If you could please tell me which line/part is wrong and what it should be, I would appreciate it

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采纳的回答

Image Analyst 2013-10-29

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/104272-how-to-take-variable-number-of-inputs-arugments-and-return-their-sum#answer_113604

在 MATLAB Online 中打开

Try this:

function theSum = AddMany(varargin)
  theSum = []; % Initialize
  if nargin == 0
    uiwait(warndlg('Please input 1 or more numbers'));
    return;
  end
  fprintf('Number of arguments: %d\n',nargin);
  celldisp(varargin)
  inputNumbers = cell2mat(deal(varargin))
  theSum = sum(inputNumbers);