Matlab "too many output arguments"

I have a function I created that takes 20 inputs, and is supposed to output 4 outputs after it uses simulink and does all the code in the function.

Also as a note, the 4 output types that I'm trying to output are different. 2 of the outputs are arrays, and the other 2 outputs are signed integers, so whole numbers.

I currently have the 1st function line as: function [w, x, y, z] = myfoo(x1, x2, ..., x20)

But I also wrote a script for testing different values and I just call on the function and pass it the 20 inputs I defined.

but for some reason when I try to get it to output my 4 values using: [w, x, y, z] = myfoo(x1, x2, ..., x20)

It gives me the error of "too many output arguments" but I don't know why.

[sixwwwwww]

Can you show how you are calling the function? and how you are passing inputs to it?

[Gilmar]

The way I'm passing inputs is by declaring them in the script and hard-coding, basically I manually set the values in my script. So I have this setup:

x1=2;

x2=72;

x20= 88;

I do that same structure a total of 20 times, and the last line of the script is basically this:

[w, x, y, z] = myfoo(x1, x2,...,x20);

I can tell it does call the function because I get all my plot graphs but its not returning my outputs.

Also the actual header line I have for my function is more like:

function [w, x_out, y_out, mod_out] = myfoo(x1, x2, ..., x20)

I don't think having the underscore character causes a problem.

[Azzi Abdelmalek]

Now, can you show your code?

[Gilmar]

I would, but I can't show you my code, which is why I've been trying to put in as much tidbits as I can. I'm not allowed to show my code to others.

Answer 1

[sixwwwwww]

Dear Gilmar, I wrote a sample function which takes 20 inputs and gives 4 outputs as below:

function [w, x, y, z] = myfoo(x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15, x16, x17, x18, x19, x20)
w = x1 + x2 + x3 + x4 + x5 + x6 + x7 + x8 + x9 + x10 + x11 + x12 + x13 + x14 + x15 + x16 + x17 + x18 + x19 + x20;
x = x1 - x2 - x3 - x4 - x5 - x6 - x7 - x8 - x9 - x10 - x11 - x12 - x13 - x14 - x15 - x16 - x17 - x18 - x19 - x20;
y = x1 * x2 * x3 * x4 * x5 * x6 * x7 * x8 * x9 * x10 * x11 * x12 * x13 * x14 * x15 * x16 * x17 * x18 * x19 * x20;
z = x1 + x2 - x3 - x4 * x5 * x6 + x7 + x8 - x9 - x10 * x11 * x12 + x13 + x14 - x15 - x16 * x17 * x18 + x19 + x20;
end

And I called this function as below:

[b, c, d, e] = myfoo(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20)

with a1, a2, ... , a20 = 1, 2, ... , 20 and I didn't got any error. So maybe you can check it and find out maybe you are allocating some value to one of your output arguments. Without code the error is difficult to sort out. I hope it helps. Good luck!