Help Writing One's Own Functions

Writing a function in MATLAB was clear enough, but I ran into a little issue I want to correct. When I wrote functions in the past, I was doing them to test a program. The newest function I wrote actually computes something within a program - and it works. The issue I have is calling the function.

With a built-in MATLAB function, say isnan, in the command prompt I can write

M = isnan(A)

for some array A. Then immediately M will be the result of the operation isnan(A).

When I wrote a function, let us call it modify. When I try

M = modify(A)

in the command prompt, I am given the following error

Error using modify
Too many output arguments.

I don't do anything at the end of my function. It ends with a loop. How can I modify my function so that I can assign to it any variable name? I want to be able to perform the same variable assignment on my function as 'M = isnan(A)' above.

Answer 1

[KALYAN ACHARJYA]

I have tried with similar, I have no issue

If I misundestood the question, please clarify?

[John D'Errico]

The important point being that as has been done here, in the function header, you see the variable M being returned as written by Kalyan. So M is created inside the function.

Now, when you use it use it like this:

Y = modify(A);

You can stuff the result into any variable.

[BM]

Hi Kalyan,

Yes, this works. My mistake was that I defined my function as

function modify(A)

rather than

    function G = modify(A)

This solves the issue completely!

Out of everything to make a mistake on, I do it only on the simplest part!

[KALYAN ACHARJYA]

@John Thanks