how many parameters can accept a function in MATLAB?

My function has 6 parameters and I get an error 'Too many input argument'

[Andrei Bobrov]

Where your function?

Answer 1

[Walter Roberson]

65500 would be the upper limit.

[Stephen23]

Is this documented somewhere?

[Walter Roberson]

I am not sure now why I said 65500 . I remember that is (or was) the limit for something, but I do not remember what now.

Testing a moment ago,

foo = @(varargin) nargin;
bar = cell(1,100000000);
tic;foo(bar{:}),toc

that worked, but took close to 2 minutes on my system. (I will try again later when I am not maxing out my hard drive moving files around.)

[Adam]

It's probably a sign that something is maybe wrong in your software designing though if you need 65500 input arguments :)

[Walter Roberson]

Not necessarily. Remember that the way to efficiently fprintf() a bunch of items with different formats is to put each item into its own cell and then fprintf(fid, format, TheCell{:}) . One should not have to know that there is a magic upper bound beyond which it is needed to break it into pieces.

For example,

str = cellstr( perms('abcde') );
idx = num2cell((1:size(str,1)));
out = [idx; str.'];
fprintf(fid, '%7d: %s', out{:});

One should not have to know that 'abcdefg' could be handled this way but that 'abcdefgh' had to switch strategies due to crossing a magic boundary around 65000 entries.

Answer 2

[Gaurav Shukla]

I have tried with 13 parameters and it worked.

The error that u have mentioned will appear if your calling function is passing more parameters than the called function can receive.

Ex: function Called(Arg1, Arg2) end

function Calling () Called(Arg1,Arg2,Arg3) end

[Prachi Agarwal]

I am trying the same thing. It is similarly showing error "To many input arguments" My calling function and called function have same number of parameters. can anyone suggest anything more which i can check

[Adam]

'Too many input arguments' doesn't mean you cannot create a function with that many parameters, it means you are calling it wrong, but it is a lot easier to tell that if you post your function signature and your calling syntax.

[Prachi Agarwal]

 output = stegno(img,msg,enc_key,FileName_msg);//calling syntax
function [J] = stegno(img,msg,enc_key,FileName_msg) //function signature

[Prachi Agarwal]

Thank you Adam my code is now working fine. Still, i don't know what was the error.